Which of the following statements about telephone interviewing is true?

A) It usually takes a long time to gather information through telephone interviews.
B) The interviewer is unable to clarify questions if respondents do not understand them.
C) The response rate for telephone interviews has been typically lower than for mailed questionnaires.
D) The US government generally encourages telemarketing by firms.
E) Telephone interviewing in the US is getting more difficult because of consumers' growing antipathy toward telemarketers.

E