Points with coordinates (1,1),(5,1) and (1,7) are three vertices of a rectangle. What are the coordinates of the fourth vertex of the rectangle?

Answer Choices
A. (1,5)
B. (5,5)
C. (5,7)
D. (7,1)
E. (7,5)
Points with coordinates (1,1),(5,1) and (1,7) are three vertices of a rectangle. What are the coordinates of the fourth vertex of the rectangle?
Answer Choices
A. (1,5)
B. (5,5)
C. (5,7)
D. (7,1)
E. (7,5)