i was going through my java exercise and here is exercise that i did not get it. let me know if you know anything.

suppose cursor refers to a node in a linked list (using the Node class with instance variables called data and link). What boolean expression will be true when cursor refers to the tail node of the list?

a) (cursor==null)
B) (cursor.link==null)
c) (cursor.data==null)
D) (cursor.data==0.0)
E) none of the above