In a residential complex consisting of two apartment buildings, one with units numbered 01 to 72 and the other with units numbered 01 to 88 with consecutive numbers, Onur, who lives there, sends a message to Engin, whom he has invited to his home, with the site address, apartment, and unit number.
According to this, what is the sum of the digits of Onur's apartment number?
A) 8
B) 10
C) 12
D) 14
E) 16