In Computing a Predetermined Overhead Rate, Production Volume Is

In computing a predetermined overhead rate, production volume is

A) the most common measure of activity volume because it can be added across different types of products.
B) not generally used as a measure of activity volume because companies make a variety of different types of products.
C) cannot be used as a measure of activity volume because it fluctuates from year to year.
D) a common measure of activity volume if production occurs evenly throughout the year.
E) none of the above.