Please Help!!!!!
Identify the correctly punctuated sentence in each group.

A: The detective said Time is of the essence.
B: The detective said, "Time is of the essence".
C: The detective said "Time is of the essence".
D: The detective said "Time is of the essence."

Why must a research paper always include a Works Cited page?

A: to convince readers that common knowledge is valid
B: to give proper credit to original source material
C: to explain in detail why quotations are used in the paper
D: to list all authors' names correcty