Oil prices rose Monday after a quiet session trading little changed, as investors focused on the persistent supply glut that has weighed on the market. The U.S. oil benchmark for April delivery rose 1.2% to settle at $39.91 a barrel on the New York Mercantile Exchange. The April contract expired with the close of trading Monday; most of the trading volume in the market has moved forward into the May contract, which ended 0.9% higher…