I'm not 100% sure on what the answer is but I think its either B or C.
The first major Civil Rights action King was involved in was the "<span>c. Montgomery Bus Boycott," since this was a perfect way for King and his followers to implement a string of non-violent protests. </span>
The 3/5ths compromise was the law that designated how slaves were to be treated and represented. Previously an African American was counted as only 3/5ths of a person, hence the name of the compromise.
The answer is A! Lincoln often referred to God in his speech.