Red marrow is found within:. a. the large cavities contained within the shafts of long bone.
b. compact bone canals.
c. spaces within spongy bone.
d. all osseous tissue of the appendicular skeleton.

C. spaces within spongy bone.

Explanation:

The bone marrow normally is said to either be a red or yellow in a human body depending on the cells that aids in its production. Hematpoeitic is seen to be known as stem cells that are seen in red blood cells production.

These red marrow are found within the spongy bone after, fat tissue gradually replaces the red marrow, these are only in adults in body parts like vertebrae, breastbone, ribs, skull etc other cancellous, spongy.

It is known according to experts that sensitivity of marrow to damage by radiation therapy accounts for cure to impair immunity and blood production.