Face to face survey
The researcher or interviewee can establish rapport and dig into complex issues. The best form of face to face survey is called a focus group.
Answer:
15 points higher
Explanation:
The <u><em>Flynn Effect</em></u> is a phenomenon that the increase in IQ over the ages is an increase in <u><em>overall abstract problem solving</em></u> rather than actual intelligence, and are attributed to the environment in which younger generations are surrounded by compared to older generations. According to this effect an average 18-year old scored 15 points higher than that of someone 60 years ago.
**I had this question and studied the Flynn Effect in high school**
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I think D is the correct with my explanation