Given these processes: (1) An osteon is produced. (2) Osteoblasts from the periosteum form a series of ridges. (3) The periosteum becomes the endosteum. (4) Osteoblasts lay down bone to produce a...

Given these processes:
(1) An osteon is produced.
(2) Osteoblasts from the periosteum form a series of ridges.
(3) The periosteum becomes the endosteum.
(4) Osteoblasts lay down bone to produce a concentric lamella.
(5) Grooves are changed into tunnels.
Which sequence best represents the order in which these processes
occur during growth in the width of a long bone?
a. 1,4,2,3,5 c. 3,4,2,1,5 e. 5,4,2,1,3
b. 2,5,3,4,1 d. 4,2,1,5,3