Study the coordinate plane below.

A graph with a x and y axis marking from Zero to nine. The points marked as red as (1,1),(4,3),(7,3),(8,1),(2,5),(9,5),(4,7),(7,7),(9,5),(1,8),(8,8).

A certain polygon has its vertices at the following points:

(1, 1), (1, 8), (8, 1), and (8, 8)

What is the best description of this polygon?
A.
trapezoid
B.
pentagon
C.
triangle
D.
square