Which of the Following Is a Disadvantage of the Telephone

Multiple Choice

Which of the following is a disadvantage of the telephone survey as a research method?

A) It results in a non-centralized control of data collection.
B) It results in a disproportionate coverage of low-income groups.
C) It results in a lengthy and drawn-out data collection process.
D) It results in the least cost-effective method of data collection.