How Many Terms Are in the Expression $$x ^ { 4 } + 4 x ^ { 3 } + 4 x + 1$$

How many terms are in the expression? $$x ^ { 4 } + 4 x ^ { 3 } + 4 x + 1$$

A) 5
B) 4
C) 7
D) 6
E) 2