The Supreme Court's Paramount decision ultimately ended which two studio business practices?

A) the production code and block booking
B) block booking and vertical integration
C) block booking and horizontal integration
D) the production code and vertical integration

The Paramount decision ended both block booking and vertical integration, as the court ruled that these practices were anti-competitive and violated antitrust laws. The decision ordered the major studios to divest their ownership of theater chains and prohibited the practice of forcing theaters to exhibit a block of films as a condition for obtaining a popular movie. However, the production code was not affected by the Paramount decision and remained in effect until the late 1960s.