C. (1,0)
This is a simple matter of determining the midpoint of both diagonals. The 1st diagonal is from point H(-2,2) to point J(4,-2). And the midpoint is simply the average of both points. So you get:
((-2+4)/2, (2-2)/2) = (2/2, 0/2) = (1, 0)
And the 2nd diagonal is from point I(4,3) to point K(-2,-3). And its midpoint is
((4-2)/2, (3-3)/2) = (2/2, 0/2) = (1, 0)
So you see that the midpoint of both diagonals is the same (1,0) and that matches option C.
