Frank Tells Gala That She Can Camp on Frank's Beach

Frank tells Gala that she can camp on Frank's beach and swim in his lake whenever she wants. With respect to the right to camp and swim,

A) Frank can withdraw or revoke the right.
B) Gala can exercise the right for the duration of her life.
C) Gala can pass title to the right to her heirs.
D) Gala can force her way into Frank's lake whenever she sees fit.