Conversation so far:
Where was Matt Bomer born?
Matt Bomer was born in Webster Groves, Missouri.
Where did Matt Bomer go to school?
Matt Bomer went to Klein High School.
Who were Matt Bomer parents?
Matt Bomer's parents were Elizabeth Macy (née Staton) and John O'Neill Bomer IV

Question: What did he study in college?
Self-contained rewrite: What did Matt Bomer study in college?