What are party whips in congress? how did they influence legislation? will give

A whip is an official of a political party whose task is to ensure party discipline in a legislature. the House of Representatives and Senate, have majority and minority whips. They in turn have smaller regional whips. While members of Congress often vote along party lines, the influence of the whip is weaker than in the UK system. which means that although they do keep congress in line, the influence isn't that significant.

i have to go with a for this one