Answer:
From help from another user my answer was wrong to begin with the answer is C.
Explanation:
Most blood cells are created in bone marrow, the spongy substance found inside the bone structure.
B is a function of the skeletal system
The bones make the frame work of the body which allows us to stand and keep structure instead of being like slime.
A is a function of the skeletal system
ONCE AGAIN: The correct answer is C
