Question

what information in source a supports the idea that pacs should not be restricted?
\there was a law that prohibited corporations from buying their own campaign advertisements\
\did not raise concerns about... corruption and the first amendment rights could not be limited\
\a supreme court case involving the pac... which supported conservative candidates\
\political advertisements had to... identify the... organizations responsible for their content\

Explanation:

The First Amendment protects freedom of speech. If PACs' rights (related to political spending which can be seen as a form of speech) are not limited (as stated in the option), it supports the idea that PACs should not be restricted. The mention of no concerns about corruption also implies a lack of a valid reason (like corruption) to restrict them.

Answer:

"did not raise concerns about... corruption and the First Amendment rights could not be limited"