A2B3C4D1Answer: A. 2 Read Explanation: Diagonals Bisect Each Other:If a parallelogram has diagonals AC and BD, they intersect at their midpoint.This means:AO=OC and BO=OD3y=y+23y=y+23y=y+22y=22y=22y=2y=1y=1y=1x+3=2x+yx+3=2x+yx+3=2x+y3=x+13=x+13=x+1x=2x=2x=2 Read more in App