Which is NOT true of the tendoachilles?

• A. it inserts into the middle third of the posterior surface of the calcaneus
• B. it is invested in a synovial sheath
• C. it is formed from the soleus and gastrocnemius
• D. a bursa lies between the tendon and the upper third of the calcaneus
• E. a bursa lies between it and the deep fascia near its insertion