During Closed-Chain Strengthening of the Quadriceps,the Range of Knee Motion $\circ$

During closed-chain strengthening of the quadriceps,the range of knee motion (ROM) in which the greatest amount of patellofemoral compression occurs is:

A) At all portions of the ROM (i.e. ,compressive forces are equal throughout the ROM) .
B) Between 30 ^$\circ$ of knee flexion to full extension.
C) Between 60 ^$\circ$ of knee flexion to 30 ^$\circ$ of knee flexion.
D) Between 60 ^$\circ$ of knee flexion to full knee flexion.