In determining whether an affiliated group exists, which of the following is correct?

A. A parent corporation must indirectly own at least 50% of one other corporation.

B. An affiliated group requires direct ownership of at least 100% of one other corporation.

C. An affiliated group requires that the parent have direct ownership of at least 80% of one other corporation's stock.

D. Three years must have lapsed since the corporation ceased to be a member of the affiliated group.