Which of these is true about telemarketing? O A) It has lost much of its effectiveness in recent years in all markets. 0 B) Its use has increased in all sectors, both for-profit and nonprofit. O C) Its use is generally restricted to inbound telemarketing. O D) Its use is now limited to political campaigns and fundraising. 0 E) It has lost much of its effectiveness in recent years, but its use in B-to-B marketing is increasing