Correct option is C
The correct option to fill in the blank is (c)
didn’t.
Explanation: The auxiliary verb “did” is used for simple past tense. The sentence talks about a past habit or event, so “didn’t” (did not) is appropriate.
Example: I didn’t hear what he said.
Why other options are incorrect:
· (a) wasn't: Incorrect auxiliary (used for “be” verbs, not action verbs like “pay”).
· (b) hasn't: Incorrect tense and subject-verb mismatch.
· (d) haven’t: Present perfect – incorrect for past actions.
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Information Booster: Simple past uses “did + base verb” for negatives and questions.