Once a Macrophage Ingests a Foreign Antigen, How Is the Antigen

Once a macrophage ingests a foreign antigen, how is the antigen presented?

A) The antigen is embedded directly into the cell membrane of the macrophage.
B) The antigen is embedded in the membrane of a transport vesicle and released via exocytosis.
C) The antigen is attached to a receptor protein, forming a receptor-antigen complex.
D) The antigen is attached to MHC markers, forming a MHC-antigen complex
E) The antigen becomes part of the T cell membrane.