Oil at three-week high ahead of OPEC decision on output

By David Gaffen NEW YORK (Reuters) - Oil prices rose over 3 percent to a three-week high on Monday, catching a lift from a weaker dollar, as major oil producing countries appeared to be moving closer to agreeing to limit output. Brent crude oil has risen 11 percent in a week since Saudi Arabia, the de facto leader of the Organization of the Petroleum Exporting Countries, started a diplomatic charm offensive to persuade the group's more reluctant members to join its proposed output plan. OPEC mem