What is the maximum area of an isosceles trapezoid that has legs of length 1 and one base twice as long as the other?
<spanclass=′latex−bold′>(A)</span>45<spanclass=′latex−bold′>(B)</span>78<spanclass=′latex−bold′>(C)</span>452<spanclass=′latex−bold′>(D)</span>23<spanclass=′latex−bold′>(E)</span>433