A
Biceps femoris, iliotibial band, and lateral gastrocnemius tendon.
B
Fibular collateral ligament (FCL), popliteus tendon, and popliteofibular ligament (PFL).
C
Arcuate ligament, fabellofibular ligament, and fibular collateral ligament (FCL).
D
Popliteus tendon, arcuate ligament, and iliotibial band.
Explanation:While the PLC has many components, biomechanical studies demonstrate that the FCL, popliteus tendon, and the popliteofibular ligament (PFL) are the three major static restraints to varus and posterolateral rotatory instability. Modern anatomic reconstructions specifically target these three. Reference: LaPrade et al., 'The anatomy of the posterior aspect of the knee...', J Bone Joint Surg Am (2003).