In Honor of Rosa Parks' Contribution to the Civil Rights

In honor of Rosa Parks' contribution to the civil rights movement, the seat behind the driver on buses in major cities was reserved for one day, and people were asked not to sit there.Some people did actually sit in this seat.When a reporter asked these "sitters" to explain their behavior, he found that

A) most of them were racists trying to make a point.
B) they were narcissists who felt entitled to sit there.
C) they were usually children who did not know who Rosa Parks was.
D) they usually just hadn't seen the sign or hadn't been paying attention.