Most state constitutions now mandate that the state budget be balanced each year.
(A) mandate that the state budget be balanced
(B) mandate the state budget to be balanced
(C) mandate that the state budget will be balanced
(D) have a mandate for a balanced state budget
(E) have a mandate to balance the state budget
how to eliminate E ??
"Mandate" is a special verb which can impose subjunctive mood on the sentence. So the above sntence is an example of subjunctive mood. The sentence formation for subjunctive mood is-
........mandate that [subject] [infinitive verb without to] [rest of the sentence]
Hence, A is the only correct answer.
There are other verbs like request, demand propose, mandate etc which imposes subjunctive mood on the sentence.