Which Step in Steroid Hormone Biosynthesis Is Stimulated by Adrenocorticotropic $\rightarrow$

Which step in steroid hormone biosynthesis is stimulated by adrenocorticotropic hormone (ACTH) ?

A) Cholesterol $\rightarrow$ pregnenolone
B) Progesterone $\rightarrow$ 11-deoxycorticosterone
C) 17-Hydroxypregnenolone $\rightarrow$ dehydroepiandrosterone
D) Testosterone $\rightarrow$ estradiol
E) Testosterone $\rightarrow$ dihydrotestosterone