The governor’s team of advisors, including her education and political strategists, has not been available for comment since the governor released her controversial education reform proposal.
(A) has not been available for comment since the governor released her controversial education reform proposal
Correct
(B) have not been available for comment since the governor released her controversial education reform proposal
SV error ; governor's team (singular) ... have (plural) .. Incorrect
(C)
...
(A) has not been available for comment since the governor released her controversial education reform proposal
Correct
(B) have not been available for comment since the governor released her controversial education reform proposal
SV error ; governor's team (singular) ... have (plural) .. Incorrect
(C)
...


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