Who is at the greatest risk of contracting STIs?
A.
a sexually active person at age 22
B.
a sexually active person at age 16
C.
a sexually active person at age 20
D.
none of the above

Who is at the greatest risk of contracting STIs?
A.
a sexually active person at age 22
B.
a sexually active person at age 16
C.
a sexually active person at age 20
D.
none of the above