Which of the Following Is NOT a Reason Why Young

Which of the following is NOT a reason why young people are at greater risk for sexually transmitted infections (STIs) ?

A) They are more likely to have multiple sexual partners.
B) They are more likely to engage in risky behavior.
C) They are more likely to select partners who are at higher risk for acquiring an STI.
D) They are more likely to have lower immunity than more mature adults.