Which of These Statements Regarding Telemarketing Is Most Accurate

Which of these statements regarding telemarketing is most accurate?

A) Shopping bots are computers that place automated or "robo" (i.e., robotic) telemarketing calls.
B) Direct mail is typically viewed as a more efficient means of targeting consumers than telemarketing.
C) Telemarketing has become more effective as a result of the National Please-Do-Call registry legislation.
D) Consumer privacy, industry standards, and ethical guidelines have become important issues.
E) Many firms are considering shifting their direct-mail and door-to-door budgets to telemarketing techniques.