D Is V's Singing Teacher

D is V's singing teacher. V is an innocent young woman. D claims that sexual intercourse will improve her breathing technique, on the basis of which she agrees to sex. Which of the following is correct:

A) V will have consented by choice under s74 SOA 2003.
B) V will not have consented due to incapacity.
C) V's consent will be undermined by D's deception as to his purpose.
D) V's consent will be undermined by D's deception as to the nature of the act.