DrAngelo Is Conducting a Cross-Fostering Study

Multiple Choice

Dr.Angelo is conducting a cross-fostering study.She should be cautious about the fact that cross-fostering studies

A) speak to the issue of environmental influence,but they cannot rule out the role of heredity.
B) address the issue of genetics but not the issue of heredity.
C) provide evidence than can lead us to determine the direction of causality.
D) speak to the issue of heredity,but they cannot rule out the role of environmental influences.