Choose the sentence that uses correct spelling and capitalization.

ACommittee members agreed that its primary purpose is to ensure the selection of music will be approved by the principal.
BCommittee members agreed that it's primary purpose is to ensure the selection of music will be approved by the principal.
CCommittee members agreed that its primary purpose is to insure the selection of music will be approved by the principal.
DCommittee members agreed that its primary purpose is to ensure the selection of music will be approved by the Principal.