He __________ what you have, simply because he was with me at the time.
Correct answer: A
Knowledge: Modal verbs
can’t have done sth: cannot have done (only the possibility of doing)
can’t do sth: can’t do anything
mightn’t have done sth: could not have done (possibility)
won’t do sth: won’t do anything
Translated: He couldn’t do what you criticized, simply because he was with me at the time.