One Reason Movie Theatres Charge a Lower Admission Price to Senior

One reason movie theatres charge a lower admission price to senior citizens is that

A) senior citizens have a less elastic demand than other movie- goers.
B) senior citizens have a more elastic demand than other movie- goers.
C) government sets the price policies.
D) movie- theatre owners are able to practice perfect price discrimination.
E) senior citizens have a higher willingness- to- pay than other people.