T Cells Travel from the Bone Marrow to the Thymus

T cells travel from the bone marrow to the thymus for maturation.What is the correct order of the maturation sequence for T cells in the thymus?

A) bone marrow to the cortex; after thymic education,released back to peripheral circulation
B) storage in either the cortex or medulla; release of T cells into the peripheral circulation
C) maturation and selection occur in the cortex,then the medulla; release of mature T cells to secondary lymphoid organs
D) activation and selection occur in the medulla; mature T cells stored in the cortex until activated by antigen