The sentence describes a past action, so the past tense form of the verb "give" is required.
The past tense form of "give" is "gave".
The sentence becomes:
She gave an ambiguous answer.
The correct answer is "gave".
Each question has a sentence that has an underlined part. Choose the option which rephrases the underlined part in the most appropriate manner in terms of grammar and usage.
In an attempt to boost their profits, many edible oil-producing companies have been engaging themselves in propaganda against commonly used oils and promoting exotic and expensive varieties of oils \(\underline{as\ more\ healthier\ options.} \)