The correct answer is D. cdr.
The cdr function in Lisp returns the list that results after the first element is removed (the rest of the list).
For example, if we have the list (1 2 3), then cdr(1 2 3) would return (2 3).
The car function returns the first element of a list.
The last function returns the last element of a list.
The cons function creates a new list with the given element as the first element and the given list as the rest of the list.
For example, cons(1 (2 3)) would return (1 2 3).