Answer A

Your answer: Barack Obama & George H.W. Bush

While both Barack Obama and George H.W. Bush spoke at a U-M commencement ceremony, so did Bill Clinton and Gerald Ford. The answer was "All of the above."
 

Answer B

Your answer: William Clinton & Gerald R. Ford 

While both Bill Clinton and Gerald Ford spoke at a U-M commencement ceremony, so did Barack Obama and George H.W. Bush. The answer was "All of the above."

Answer C

Your answer: All of the above

Correct! Barack Obama, George H.W. Bush, Bill Clinton, and Gerald Ford all spoke at a U-M commencement ceremony.