Identify the sentence that has a problem in​ subject-verb agreement.

AThe sales tax increase​, although not favored by some business​ owners, was overwhelmingly voted in by the legislature.

BThe most dedicated volunteers at our local homeless shelter were once homeless themselves.

CHandheld​ devices, including cell phones and​ tablets, are rapidly replacing personal computers for many users.

DMany​ musicians, including unlikely candidates such as Elvis​ Presley, has been influenced by gospel music.