I'm having some issues with the following multiple choice question. I am required not only to prove the correct answer, but also to state and show mathematically why the others are not correct.
Response A appears to allow for a rectangle, but also a square. While response B appears to be just a square. The remaining 3 responses do not seem to be limited to being only a rectangle. How would you suggest I tackle this problem. My observations are not really backed up by any substantial math. Which response allows for only a rectangle and how would you go about proving this.