plz hurry Cari is 3 years older than her brother Mark. Write Cari's age (c) as a function of Mark's age (m) and determine how old Cari will be when Mark is 15.


(A) c = m + 3; 18 years old

(B) c = m − 3; 12 years old

(C) m = c + 3; 12 years old

(D) m = c − 3; 18 years old