What Was the Supreme Court's Holding in Buckley V

What was the Supreme Court's holding in Buckley v. Valeo (1976) ?

A) Campaign speech is protected by the First Amendment even if it is misleading or false.
B) Limits were placed on the amount of time, members can spend campaigning while in office.
C) Campaign ads must be truthful or candidates will be responsible for stiff fines.
D) Campaign contributions and spending are considered free speech protected by the First Amendment.