Which of the following statements about the standard variable factory overhead application rate is true?
a) The rate is a function of the denominator volume chosen.
b) The rate is used for cost-control, but not product-costing purposes.
c) The rate is used for product-costing, but not cost-control purposes.
d) The same rate is used for both product-costing and cost-control purposes.
e) Generally speaking, the rate will be independent of the allocation base chosen to apply overhead.