The correct answer is **his hypothesis has been flawed** (Option 4).
**Comprehensive Derivation:**
The correct answer is "his hypothesis has been flawed".
Explanation & Key Takeaways:
• The given sentence is describing past events and actions, therefore we need to maintain a consistent past tense throughout.
• The auxiliary verb "has" in the phrase "has been flawed" should instead be "had" to maintain the past perfect tense.
• when referring to something that had already happened at a specific time in the past.
Therefore, the correct answer is "option 4".
**Option Elimination:**
• **Option 1 (the inspector realised that)**: Incorrect distractor.
• **Option 2 (from the very beginning)**: Incorrect distractor.
• **Option 3 (After analysing every piece of evidence)**: Incorrect distractor.
• **Option 4 (his hypothesis has been flawed)**: Correct Answer; accurate according to canonical reference.
**Exam Trap:**
Be careful of misleading distractors and subtle terminology differences. Verify core properties before selecting your answer.
**Memory Booster:**
Core mnemonic rule: his hypothesis has been flawed corresponds to Option (4).
The correct answer is **his hypothesis has been flawed** (Option 4).
**Comprehensive Derivation:**
The correct answer is "his hypothesis has been flawed".
Explanation & Key Takeaways:
• The given sentence is describing past events and actions, therefore we need to maintain a consistent past tense throughout.
• The auxiliary verb "has" in the phrase "has been flawed" should instead be "had" to maintain the past perfect tense.
• when referring to something that had already happened at a specific time in the past.
Therefore, the correct answer is "option 4".
**Option Elimination:**
• **Option 1 (the inspector realised that)**: Incorrect distractor.
• **Option 2 (from the very beginning)**: Incorrect distractor.
• **Option 3 (After analysing every piece of evidence)**: Incorrect distractor.
• **Option 4 (his hypothesis has been flawed)**: Correct Answer; accurate according to canonical reference.
**Exam Trap:**
Be careful of misleading distractors and subtle terminology differences. Verify core properties before selecting your answer.
**Memory Booster:**
Core mnemonic rule: his hypothesis has been flawed corresponds to Option (4).
Be careful of misleading distractors and subtle terminology differences. Verify core properties before selecting your answer.
Be careful of misleading distractors and subtle terminology differences. Verify core properties before selecting your answer.
Core mnemonic rule: his hypothesis has been flawed corresponds to Option (4).
Core mnemonic rule: his hypothesis has been flawed corresponds to Option (4).
**Option Elimination:**
• **Option 1 (the inspector realised that)**: Incorrect distractor.
• **Option 2 (from the very beginning)**: Incorrect distractor.
• **Option 3 (After analysing every piece of evidence)**: Incorrect distractor.
• **Option 4 (his hypothesis has been flawed)**: Correct Answer; accurate according to canonical reference.
**Option Elimination:**
• **Option 1 (the inspector realised that)**: Incorrect distractor.
• **Option 2 (from the very beginning)**: Incorrect distractor.
• **Option 3 (After analysing every piece of evidence)**: Incorrect distractor.
• **Option 4 (his hypothesis has been flawed)**: Correct Answer; accurate according to canonical reference.