What is the primary mechanism underlying patellar tendon lateral femoral condyle friction syndrome?
A) Compression of the patellar tendon against the femoral condyle during knee extension.
B) Degenerative changes in the patellar tendon due to repetitive stress.
C) Inflammation of the synovial membrane surrounding the patellar tendon.
D) Impingement of the medial meniscus on the patellar tendon during flexion.