Which Use of the Deviation IQ to Measure Intelligence Differences

Multiple Choice

Which use of the deviation IQ to measure intelligence differences is invalid?

A) as a screen for scholastic aptitude in high school seniors
B) as a screen for cognitive functioning at an assisted-living facility for senior citizens
C) to study intelligence differences between the preoperational and formal operational stage
D) to study intelligence differences between young adults who abuse drugs and those who do not