Question #N647

In 1965, the United States Congress passed the Voting Rights Act, a landmark piece of legislation that outlawed discriminatory voting practices in the South. The Voting Rights Act was a major victory for the civil rights movement, and it remains an important piece of legislation today.

Which choice best combines the sentences at the underlined portion to create a grammatically correct and stylistically effective sentence?
A. the Voting Rights Act was a major victory for the civil rights movement and
B. the Voting Rights Act, a major victory for the civil rights movement, and
C. the Voting Rights Act—a major victory for the civil rights movement—and
D. the Voting Rights Act; a major victory for the civil rights movement, and