Place the steps of the adaptive immune response in order

1. Antibodies are produced.
2. Macrophages present the MCH I molecule and foreign antigen.
3. T lymphocytes are stimulated.
4. B lymphocytes are stimulated.

A) 2, 1, 3, 4 B) 2, 4, 3, 1 C) 2, 3, 4, 1 D) 3, 4, 2, 1

C