Telemarketing and Cold Calls Have Become Less Popular as Sales

Telemarketing and cold calls have become less popular as sales tools because of all of the following reasons EXCEPT

A) their success rate is low.
B) they can be expensive.
C) they are affected by state and federal laws prohibiting them under certain conditions.
D) during cold calls, the salesperson is not able to establish the customer's needs ahead of time.
E) they require appointments, which takes time away from the actual selling of the product.