Which action would be considered unethical when writing in the informative mode?

A. Jake decided against using statistics in his report because he believed they were unreliable.
B. Bette chose to include a lengthy direct quotation because she wanted to make sure she got the speaker's words exactly right.
C. Meg made a copy of a book's publisher information in case she decided to use the book as a source.
D. Alec wrote an article about Russia without identifying himself as a former government worker in Moscow.