A Patient, Age 24, Is Recovering from a Fractured Tibia

A patient, age 24, is recovering from a fractured tibia. She has been wearing a leg cast for the past month to immobilize the fracture and promote proper alignment. She is being seen at the clinic for follow-up radiographic evaluation of the fracture. The physician tells her that he is hoping for good callus formation to have occurred. When she asks what callus formation is, the nurse tells her it is

A) when blood vessels of the bone are compressed.
B) a part of the bone healing process after a fracture when new bone is being formed over the fracture site.
C) the formation of a clot over the fracture site.
D) when the hematoma becomes organized and a fibrin meshwork is formed.