Check which statement best describes the effect of the muckraker’s efforts: (1 pt) . the government sent the journalists to jail, but made some changes. laws and regulations were passed that made profits for businessmen. corrupt practices were exposed. journalists were prevented from writing about injustices.

I think the answer is letter C. Corrupt practices were exposed. 

Many journalist and cartoonist have exposed many corrupt politicians during the Progressive Era. They moved away from the intellectual writing but rather used simpler articles to make it easier for locals to understand the political and social issues that Americans faced during those times. 

C4 i’m pretty sure

It can provide a social code to protect each citizen's future economical earnings. and then obviously defending the country from invading countries.