求问一道逻辑题目

大懒虫fgnUID：3278912

Years ago, consumers in Frieland began paying an
energy tax in the form of two Frieland pennies for
each unit of energy consumed that came from
nonrenewable sources. Following the introduction of
this energy tax, there was a steady reduction in the
total yearly consumption of energy from
nonrenewable sources.

If the statements in the passage are true, then which of
the following must on the basis of them be true?
(A) There was a steady decline in the yearly revenues
generated by the energy tax in Frieland.
(B) There was a steady decline in the total amount of
energy consumed each year in Frieland.
(C)There was a steady increase in the use of
renewable energy sources in Frieland
(D) The revenues generated by the energy tax were
used to promote the use of energy from
renewable sources.
(E) The use of renewable energy sources in Frieland
greatly increased relative to the use of
nonrenewable energy sources.

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答案是A，难道energy tax不包括其他部分么？？？比如 renewable energy tax。
仅仅凭借非再生能源税的下降就能判断整体energy tax都下降了？？

love_pxijunUID：3241321

题目中说的能源税只与非再生能源有关，与可再生能源无关吧~~楼主可能想多了~~