Which of the following normally occurs when a woman is becoming sexually aroused and vaginally lubricated?

Which of the following normally occurs when a woman is becoming sexually aroused and vaginally lubricated? Check all correct options for full credit.

Select one OR more:

a. Sensory stimulation increases activity in the pudendal nerve

b. VIP release by the cavernosal nerve decreases in the vaginal walls

c. There is an increase in the release of nitric oxide release by the parasympathetic nervous system in the vaginal walls and clitoris

d. The parasympathetic nervous system causes muscles to contract in the arteries supplying blood to the vaginal walls