Each question has four sentences. One or more sentences may be incorrect in grammar or meaning. Identify the sentence(s) that are incorrect.
A. The central bank warned commercial lenders that increasing interest rates abruptly might hamper small business growth during the current financial quarter.
B. Had the agricultural ministry introduced crop insurance schemes earlier, thousands of distressed farmers had not suffered severe financial losses.
C. Scarcely had the environmental summit commenced than the lead delegates raised strong objections against the proposed industrial emissions target.
D. Literature experts believe that reading classic novels not only improves vocabulary skills but also enhances empathy among young children.

• Sentence A is CORRECT: The modal verb might is correctly followed by the base form hamper.  • Sentence B is INCORRECT: In a conditional sentence starting with "Had + subject + past participle" (3rd Conditional Inversion), the main clause must use "would not have + past participle", not "had not". o Rule: Had + Subject + V3 ... Subject + would/could/should have + V3 o Correction: "...farmers would not have suffered severe financial losses." • Sentence C is INCORRECT: Words like "Scarcely" and "Hardly" are always followed by "when" or "before", never by "than". ("Than" is used with "No sooner"). o Rule: Scarcely / Hardly ... when | No sooner ... than o Correction: "...commenced when the lead delegates raised..." • Sentence D is CORRECT: Parallel structure with "not only... but also" is maintained correctly.