If Julie, a 14-Year-Old Girl, and Chris, Her 19-Year-Old Boyfriend

If Julie, a 14-year-old girl, and Chris, her 19-year-old boyfriend, engage in sexual activity that Julie has actively consented to, then:

A) no other person can hold Chris accountable for sexual misconduct.
B) Julie has, by default, given consent to any sexual activity that Chris wants her to participate in at a future time.
C) the consent is irrelevant, because Julie is a minor whom the state considers too young to agree to engage in sexual activity with a legal adult.
D) Julie has demonstrated that she is cognitively capable of, and emotionally mature enough, to participate in an intimate relationship.