Answer:
A). Republicans argued that revealing the identity of donors would limit the amount contributed to political campaigns.
Step-by-step explanation:
Republican party also known as GOP(Grand Old Party) was one of the substantial political parties, another being the Democratic party in the United States.
As per the question, option A best reflects the views of the Republicans over the 501C's capability to hide its donors/supporters(a non-profit organization that is excused from paying federal taxes on income). They argued that disclosing or revealing the identity of the donors/contributors may lead to restriction of the amount collected/contributed for the political campaigns that would eventually affect the outcomes. Thus, they wanted it to remain hidden and therefore, option A is the correct answer.