AB is the hypotenuse of a right triangle ABC. Median AD has length 7 and median BE has length 4. The length of AB is:
<spanclass=′latex−bold′>(A)</span> 10<spanclass=′latex−bold′>(B)</span> 53<spanclass=′latex−bold′>(C)</span> 52<spanclass=′latex−bold′>(D)</span> 213<spanclass=′latex−bold′>(E)</span> 215 Pythagorean Theoremgeometry