To avoid being intrusive and​ annoying, most legitimate​ e-mail marketers practice​ ______, which means sending​ e-mail pitches only to customers who​ "opt in."

To avoid being intrusive and​ annoying, most legitimate​ e-mail marketers practice​ ______, which means sending​ e-mail pitches only to customers who​ "opt in."




A.

unsolicited​ e-mail marketing

B.

spamming

C.

phishing

D.

viral marketing

E.

​permission-based e-mail marketing



Answer: E.

​permission-based e-mail marketing


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