Answer:
C. Accept.
Step-by-step explanation:
The underlined word "acquiesce" refers to accepting something with reluctance but without any protest or opposition. This means that acceptance is something which one doesn't agree with or support but at the same time has to reluctantly accept it without any opposition. In short, it means one is left with no choice but to accept it.
So, in the given sentence, it means the decision to transfer to a different school must be agreed upon without any questions.
Thus, the correct answer is option C.