Explain the Primary Difference Between Endochondral Ossification and Intramembranous Ossification

Explain the primary difference between endochondral ossification and intramembranous ossification.

A) The primary difference is that in endochondral ossification,bone develops from a cartilage model,whereas in intramembranous ossification,bone develops from mesenchymal cells.
B) The primary difference is that in endochondral ossification,bone develops from mesenchymal cells,whereas in intramembranous ossification,bone develops from a cartilage model.
C) The primary difference is that in endochondral ossification,bone develops fast,whereas in intramembranous ossification,bone develops slowly.
D) The primary difference is that in endochondral ossification,bone develops slowly,whereas in intramembranous ossification,bone develops fast.
E) The primary difference is that endochondral ossification is embryonic bone development,whereas intramembranous ossification is post-natal bone growth.