Solve the Problem $P ( x , y )$ In the First Two Quadrants of the Disk

Multiple Choice

Solve the problem.
-Find the average distance from a point $P ( x , y )$ in the first two quadrants of the disk $x ^ { 2 } + y ^ { 2 } \leq 16$ to the origin.

A) $\frac { 4 } { 3 }$
B) 2
C) 1
D) $\frac { 8 } { 3 }$