IC: When consumers switch from diesel oil to natural gas heating, certain longer-term air pollution levels can fall, but most immediately to consumers, short-term heating costs could fall as well even though the price of heating a home with natural gas is occasionally the same as it is for oil
the conclusion : consumers can keep costs low even when roller-coaster oil prices rise again,
target weaken :
(A)
Although gaining popularity, natural gas furnaces still trail diesel oil furnaces in popularity. no mention about price ; as efficiency can be improved with installing better furnaces
(B) Many natural gas burning furnaces currently in operation release more harmful matter into the atmosphere than diesel oil furnaces do.
(C) When natural gas is burned it release methane, a chemical known to affect the atmosphere. again same as A
(D)
The price of natural gas typically demonstrates a pronounced positive correlation with the price of oil. correct means if NG is $10 and oil is $20 so any +ve increase in price of oil will increase price of NG as well ; moreover its mentioned in the argument that
roller-coaster oil prices rise again, as they inevitably will meaning prices of oil do increase
(E) Regulations prohibit the installation of new furnaces, including natural gas furnaces, without a permit
uc26 wrote:
When consumers switch from diesel oil to natural gas heating, certain longer-term air pollution levels can fall, but most immediately to consumers, short-term heating costs could fall as well even though the price of heating a home with natural gas is occasionally the same as it is for oil. By installing more efficient furnaces, consumers can keep costs low even when roller-coaster oil prices rise again, as they inevitably will, not to mention that air quality could potentially improve as well.
Which of the following, if true, would most significantly undermine the argument above?
(A) Although gaining popularity, natural gas furnaces still trail diesel oil furnaces in popularity.
(B) Many natural gas burning furnaces currently in operation release more harmful matter into the atmosphere than diesel oil furnaces do.
(C) When natural gas is burned it release methane, a chemical known to affect the atmosphere.
(D) The price of natural gas typically demonstrates a pronounced positive correlation with the price of oil.
(E) Regulations prohibit the installation of new furnaces, including natural gas furnaces, without a permit.