If the ages of P and R are added to twice theage of Q, the total becomes 59. If the ages of Q and R are added to thrice the age of P, the total becomes 68, and if the age of P is added to thrice the age of Q and thrice the age of R, the total becomes 108 What is the age of P?

A

19 years

B

15 years

C

17 years

D

12 years