Question

Convert interrogative sentence into an assertive sentence:
She was stupid to do that.

• A. Was she not stupid to do that?
• B. She wasn't stupid to do that.
• C. No change
• D. None of the above

Answer 1

The correct option is A Was she not stupid to do that?

For negative interrogation, a negative word like "not" should be used to negative the verb. Hence Option A is correct. The rest do not adhere to the goal, hence incorrect.