am$,$ a salesperson, plans to write an e$-$mail to one of his customers. Based on the don'ts of e$-$mail communication outlined by Marjorie Brody, identify the guidelines that should be followed by Ram when writing the e$-$mail. $($Check all that apply.$)$

Multiple select question.

He should not make comments or requests in the e$-$mail that he would not make in person.

He should avoid using all capital letters in the e$-$mail.

He should avoid including a signature file, or contact information, at the end of the e$-$mail.

He should not use dates or salutations in the e$-$mail.