Answer:
B. Colon
Explanation:
The punctuation mark that tells the reader to pay direct attention to the following information is the colon.
A colon is often used to separate two independent clauses when the second explains or illustrates the first. It also usually precedes a list, quotation, or block quotation.
The rest of the listed punctuation marks do not draw the reader's attention to the content that follows as much as the colon does.
Option D is the most neutral one.
I think it's D. primary source.... not 100% sure
