Ellen's Driveway Is Actually on Richard's Land, but in 20

Multiple Choice

Ellen's driveway is actually on Richard's land, but in 20 years nobody has ever said anything to Ellen about it. When Richard sells his house, a survey shows the problem and the new owner demands that Ellen abandons use of the driveway. Will she have to move her driveway?

A) Yes, if she does not actually own the land.
B) Yes, since it is not in her deed.
C) Not if she used it continuously.
D) Not if she got permission from Richard.