Question 1070138
It helps to draw this.
The diagonal is from (-1,0) to (5,0), or 6 units
The midpoint of the diagonal (2,0) is the center of the square.
The diagonals are perpendicular to each other and equal in length, so the other diagonal is on the x=2 line from y=-3 to y=3
The vertices are (2,3) and (2,-3)
The answer is B.