In a room, 2/5 of the people are wearing gloves, and 3/4 of the people are wearing hats. What is the minimum number of people in the room wearing both a hat and a glove? <spanclass=′latex−bold′>(A)</span> 3<spanclass=′latex−bold′>(B)</span> 5<spanclass=′latex−bold′>(C)</span> 8<spanclass=′latex−bold′>(D)</span> 15<spanclass=′latex−bold′>(E)</span> 20 number theoryleast common multiple