Imagine That a Young Boy (Whose Bones Are Still Growing)

Imagine that a young boy (whose bones are still growing) has snapped his femur in half. A small portion of the bone is protruding from his skin. When the doctor examines this fracture, what part of the bone will not be visible (i.e., will not be protruding from the skin) ?

A) the diaphysis
B) the marrow cavity and bone marrow
C) compact bone
D) spongy bone
E) All of these structures will be visible.