Question

So I need help figuring out what the sentence below is. (purpose, claim or message)

Remarks on the Signing of the Civil Rights Act
by Lyndon B. Johnson

"My fellow Americans, I am about to sign into law the Civil Rights Act of 1964."

I also need help with this question:
My fellow Americans, I am about to sign into law the Civil Rights Act of 1964.

Johnson used the first sentence of his speech to call attention to his _____.

A. purpose
B. claim
C. audience
D. message