Question ID:PT34 S2 Q25 Passage:Although wood-burning stoves are more efficient than open fireplaces, they are also more dangerous. The smoke that wood-burning stoves release up the chimney is cooler than the smoke from an open flame. Thus it travels more slowly and deposits more creosote, a flammable substance that can clog a chimney‚ or worse, ignite inside it. Stem:Which one of the following, if true, most seriously weakens the argument? Correct Answer Choice:CChoice A:The most efficient wood-burning stoves produce less creosote than do many open fireplaces. Choice B:The amount of creosote produced depends not only on the type of flame but on how often the stove or fireplace is used. Choice C:Open fireplaces pose more risk of severe accidents inside the home than do wood-burning stoves. Choice D:Open fireplaces also produce a large amount of creosote residue. Choice E:Homeowners in warm climates rarely use fireplaces or wood-burning stoves.