Females who lift weights are not going to develop large, bulky muscles because a. they have more muscle fibers than men b. they have thicker muscle fibers than men c. they have lower testosterone levels than men d. all of the above

Females have lower testosterone than men do. Testosterone encourages bigger muscle growth, thus making men more muscular than their female counterparts. Women who do lift weights and want to get 'big', need to take hormonal supplements to increase their testosterone levels and encourage bigger muscle growth.

Pray this helps you. :) 

Is that a negative 22 or a positive?

Iwould put 'think' in the blank