Final answer:
It is true that a voice response unit can retrieve information using both a telephone keypad and voice recognition. This technology is part of automated systems like robo-polls, which guide respondents through surveys without human interviewers but with potential challenges and legal limitations.
Step-by-step explanation:
The statement that a voice response unit obtains information from a telephone keypad and voice recognition is true. Voice response systems allow users to interact with a computer-operated phone system through the use of voice and DTMF tones input via keypad. This technology is commonly used in systems like robo-polls, which dial numbers and use electronic voices to guide respondents through surveys. They press keys to submit their answers. Robo-polls are thought to encourage more honest responses, as there's no human interviewer involved.
However, challenges include potential for error if a respondent presses the wrong keypad number, misunderstandings, lower response rates due to the lack of a live persuader, and the inability to prevent ineligible respondents like children from participating. Moreover, legal restrictions such as those outlined in the Telephone Consumer Protection Act of 1991, which prohibits automated calls to cell phones, further complicate the use of such technology.