I need it ASAP! Daniel Webster of Massachusetts was against slavery but he agreed to compromise on the issue. Why?

A.
He wanted to appeal to the proslavery majority of voters in Massachusetts.

B.
He wanted to run for president and needed southern support.

C.
He was willing to do almost anything to keep the United States together.

D.
He was swayed by John C. Calhoun's sound arguments in favor of slavery.