Main reason for narrowing a research paper topic?
a. to identify credible sources
b. to maintain focus
c. to craft a thesis
d. to build an argument

D

Explanation:

I choose D because Main Reason for narrowing a research paper topic is to build an argument.

answer: the gettysburg address is a speech delivered by abraham lincoln at the november 19, 1863, dedication of soldier’s national cemetery, a cemetery for union soldiers killed at the battle of gettysburg during the american civil war.

explanation:

it is believed to be alfred, lord himself