**Core Concept**
The popliteal fossa is a diamond-shaped space at the back of the knee joint, containing several important structures. This question requires knowledge of the anatomical arrangement of these structures from medial to lateral.

**Why the Correct Answer is Right**
The correct arrangement from medial to lateral is as follows: the sartorius muscle, the quadriceps tendon, the popliteus muscle, the popliteal artery, the tibial nerve, and the common peroneal nerve. The sartorius muscle is the longest muscle in the anterior compartment of the thigh and is located medially. The quadriceps tendon, which connects the quadriceps muscle to the patella, is located laterally. The popliteus muscle, which rotates the femur on the tibia, is located between the quadriceps tendon and the popliteal artery.

**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because the quadriceps tendon is not medially located; it is located laterally.
* **Option B:** This option is incorrect because the popliteal artery is not medially located; it is located between the popliteus muscle and the tibial nerve.
* **Option D:** This option is incorrect because the common peroneal nerve is not medially located; it is located laterally and is not part of the upper part of the popliteal fossa.

**Clinical Pearl / High-Yield Fact**
The popliteal fossa is a common site for the administration of local anesthesia for knee surgery. The saphenous nerve, which is a branch of the femoral nerve, is also located in the popliteal fossa and can be used for pain relief.

**Correct Answer:** C. popliteus muscle, popliteal artery, tibial nerve