Answer:
D. square
Step-by-step explanation:
The reason why it going to be square is because, of the picture below:
It's perfectly the same on all sides so it can't be a rectangle and it is not a diamond shape for rhombus, it also can't be a parallelogram because, parallelograms don't have the same shape as a square as seen below. Therefore, your only possible answer would be D. square
