Asummary of nativism and immigration policies

Nativism and immigration policies:

Nativism is the policy to endorse the security of the native population against those of immigrants.   The immigration of people from other countries like Japan, Europe, and Africa has created a problem like unemployment for the Native American population.

To protect the native population the American congress has passed a bill called, The immigration Act of 1924 in which immigration policy and procedures are constituted. It had formulated a system to limit the number of immigrants based on the job requirement and skill level. A quota system has been introduced proportionate to the immigrant population. This Act of 1924 has reduced the tension between the natives and immigrants.

following type of cultural development caused people to want and buy new products on the market :

the answer is d because for c the actors can't love acting for the other's audience their not even in the same show, it can't be b either because the question is talking about the actors not the audience, and it can't be a because   it's not specific enough