All of the following are true of the thymus gland except that it

Hello, I figured that the question was missing its options so I went online to find them. Here they are:

All of the following are true of the thymus gland, except that:

A) activates B cells.

B) reaches its greatest relative size during the second year of life.

C) involutes after puberty.

D) produces T cells.

E) lies in the anterior mediastinum

The correct answer is: A) activates B cells.

Explanation:

The thymus is a lymphatic organ that is located in the anterior superior mediastinum (a compartment in the thoracic cavity), in front of the heart, with the function to mature T cells (one of the types of lymphocytes, white blood cells very important for the functioning of the immune system).

The thymus is more active and bigger during childhood, when puberty hits it involutes and its functional tissue is replaced with adipose tissue (fat).

B cells are not activated in the thymus, they mature in the bone marrow.

answer : haversian

[explanation: -(compact bone is organized as parallel columns, known as haversian systems, which run lengthwise down the axis of long bones. these columns are composed of lamellae, concentric rings of bone, surrounding a central channel, or haversian canal, that contains the nerves, blood vessels, and lymphatic system of the bone)]

c. is the correct answer