Oil marches higher on OPEC optimism; analysts question deal

By Barani Krishnan NEW YORK (Reuters) - Oil prices rose nearly 3 percent on Thursday, extending their rally on optimism over OPEC's first output cut plan in eight years, despite some analysts' doubts that the reduction would be enough to rebalance a heavily over-supplied market. OPEC said other details of the plan will be known at its policy meeting in November, leaving unanswered when the agreement will come into effect, what new quotas for member countries will be and for what periods, and how