The Increase in Bone Thickness Stimulated by Growth Hormone Involves

The increase in bone thickness stimulated by growth hormone involves which of the following?

A) increased osteoblast activity on the outer surface of the bone and increased osteoclast activity on the inner surface of bone
B) increased chondrocyte activity on the inner surface of bone and increased osteoclast activity on the outer surface of the bone
C) increased osteoclast and chondrocyte activity at the epiphyseal plate
D) increased osteoclast activity on the outer surface of the bone and increased osteoblast activity on the inner surface of bone
E) increased osteoblast and chondrocyte activity at the epiphyseal plate