Research into the Eyesight of Older Individuals That Was Conducted

Research into the eyesight of older individuals that was conducted by human development researchers has led some states to change the way older drivers are screened when they renew their driver's licenses. This reflects

A) ​how research can affect social policy.
B) ​the benefits of doing meta-analytic research.
C) ​the importance of longitudinal studies.
D) ​why correlational research is superior in some ways to experimental research.