Rachel participates in e$-$mentoring when she

A$)$ gives advice on the best use of e$-$mail and social media Web sites to coworkers.

B$)$ uses e$-$mail regularly to ask for and receive advice from her mentor.

C$)$ sends e$-$mails to hundreds of employees to ask for help with problems.

D$)$ uses posts on Twitter to poke fun at the mentor.