Use the Following Information to Answer the Next Few Questions

Use the following information to answer the next few questions.
In a famous study, women were asked to smell and rate the attractiveness of axillary odours on t-shirts worn by different men. Results showed that ovulating women preferred the odour of the t-shirts worn by MHC (major histocompatibility complex) dissimilar men. This indicates that dissimilarity in MHC may play a role in mate selection.
-The purpose of an MHC molecule is to

A) display an antigen fragment on the cell surface.
B) engulf the presented pathogen.
C) release enzymes to catalyze apoptosis.
D) trigger lymphocyte proliferation.
E) secrete cytokines.