The verb 'have' can be used as an auxiliary verb when making the present perfect tense.
To make the present perfect: has or have + the past participle.
To refute something means to prove that something is not true, wrong, incorrect. So the answer would be none of those... I would choose B, it's close in meaning.
But id the questions ask what is the antonym, then the answer would be A.<span /><span />
Answer:
The answer is "Have asked"
Explanation:
This is because in the sentence they are talking about yesterday so it has to be past tence.
