Some Researchers Are Intrigued by the Results from Studies Suggesting

Multiple Choice

Some researchers are intrigued by the results from studies suggesting that sexual orientation may be manipulated by prenatal exposure to sex hormones. However, many remain unconvinced by these findings, stating that the studies of ___________ that have been done are ____________ in nature and thus they can provide no clear causal conclusions.

A) humans; correlational
B) animals; correlational
C) humans; experimental
D) animals; experimental