Which of the following statements is true?

A) Overhead is applied to jobs or departments by debiting the overhead account.

B) Overapplied overhead, after fixing at period-end, will result in a credit balance in the overhead account.

C) Underapplied overhead, if not fixed at period-end, will result in overstated gross margin.

D) If actual overhead = budgeted overhead, there will not be any overapplied or underapplied overhead.