Question

______ marketing usually occurs when customers have subscribed to receive promotional materials.
newspaper
email
mail
television

Explanation:

Email marketing is a type of marketing where businesses send promotional materials to customers who have subscribed (opted - in) to receive such communications. Newspaper, Mail (traditional postal), and Television marketing do not typically rely on customer subscription in the same way as Email marketing for sending promotional content to those who have agreed to receive it.

Answer:

B. Email