If f(y)=y^2 and y is a positive integer, which of the following CAN be the value of f(f(y))?
Choose the correct choice from the following options
A) 10	B) 15	C) 144	D) 81	E) 254
f(y)=y^2   f(f(y)) = (y^2)^2   f(f(3) = (3^2)^2 = 81   Answer 81
<result>D</result>
If f(y)=y^2 and y is a positive integer, which of the following CAN be the value of f(f(y))?