After birth, B cells change from stem cells to immature B cells in _____,Group of answer choicesbursa cellsthe liverbone marrowthe thymus gland

Answer:

After birth, B cells change from stem cells to immature B cells in the bone marrow.

Explanation:

The bone marrow is the primary site for B cell development in mammals. This process begins in the fetal stage and continues after birth. Immature B cells then migrate to peripheral sites like the spleen, where they can further mature and undergo selection processes to become fully functional B cells. The other options listed, such as the bursa of Fabricius (which is specific to birds), the liver, and the thymus gland (which is primarily involved in T cell development), are not the primary sites for B cell maturation in humans.