How did congressional voting for civil rights laws change from 1957 to 1965? the majority of both parties shifted to oppose the law. more house democrats shifted from oppposing to favoring the law. most senators from both parties shifted to oppose the law. all senate republicans shifted to favor the law.

First of all is important try to contextualized the question.

The Congress passed civil rights acts during 1957,1960 and 1964, but none of these laws were strong enough to stop voting   discrimination by local officials.

Around march of 1965 peaceful voting rights protester in Selma, Alabama were violently attacked by alabama state police.   (Source Wikipedia).

In that act of civil rights laws more house democrats shifted from opposing to favoring the law.

the correct answer is 50.