What does the author mainly discuss in the passage?1.AThe reasons behind the plunge of oilprices.2.BPossible ways to stimulate the globaleconomy.3.CThe impact of cheap oil on global economicgrowth.4.DThe effect of falling oil prices on consumerspending.Whydo some experts believe cheap oil will stimulate the global economy?1.AManufacturers can produce consumer goods at a much lowercost.2.BLower oil prices have always given a big boost to theglobaleconomy.3.COil prices may rise or fall but economic laws are not subject tochange.4.DConsumers will spend their savings from cheap oil on othercommodities.Howdoes Carl Weinberg view the current oil price plunge?1.AIt is one that has seen no parallel in economichistory.2.BIts negative effects more than cancel out its positiveeffects.3.CIt still has a chance to give rise to a boom in the globaleconomy.4.DIts effects on the global economy go against existing economic laws.