Researchers believe that the size difference between male and female brains results from the influence of: a. gender identity. b. progesterone. c. testosterone and estrogen. d. Wolffian inhibiting hormone.

Researchers believe that the size difference between male and female brains results from the influence of:

gender identity

Explanation:

individual difference would only allow such as no published journals by researcher to affirm the obvious difference in the brain size of male and female

2%? i tried finding the exact sorry if it's not 100% correct ; -;

i might be wrong but i think its a. let me know if i’m right and have a good rest of your day!