How was the nullification crisis resolved?

a. by south carolina withdrawing its call for nullification

b. by john c. calhoun giving in to andrew jackson

c. through a compromise achieved by henry clay

d. with military intervention ordered by jackson

How does benjamin rush’s decision to forsake private practice as a physician and join the war effort indicate what sort of people were attracted to the revolution? this question is a 'writer question' so it does not have any options just write the answer.