Need Help please

which one is used incorrectly?

progenitor
Noun A direct ancestor; an originator of a line of decent.

A. Charles Darwin shocked many devout Victorians when he suggested that some form of ape was the PROGENITOR of human beings.

B. Attending the birthday party were sixty of her PROGENITORS.

C. A Daughter of the american Revolution can prove that one of PROGENITORS.

D. Records filed in salt lake city help many people find information about their PROGENITORS.