Despite Treating Campaign Spending as a Form of Protected Speech

Despite treating campaign spending as a form of protected speech, the Supreme Court does prohibit:

A) "soft money" contributions to political parties.
B) unlimited spending by rich candidates on their own campaigns.
C) how much money individuals and groups can spend independent of a candidate's campaign.
D) how much money presidential candidates can spend on their own campaigns if they don't accept public funding.
E) any form of public funding for presidential campaigns.