Which Statement Concerning Yields Is Correct

Which statement concerning yields is correct?

A) Percent yield is the ratio of the actual yield to the theoretical yield times 100%.
B) Theoretical yield is the difference between the calculated yield and the actual yield.
C) Actual yield is the calculated amount of product that can be obtained from a given reaction.
D) In most chemical reactions, the amount of product isolated is larger than the theoretically possible amount.