Critical Reasoning

For bold faced arguments like the one below, the second bold faced part "for a given..." is a part of the sentence which itself is a question. A couple of options state- "second part calls that into question", these options look attractive.

When dealing with such questions are we supposed to ignore the whole sentence and just concentrate on the bold part?

Delta Products Inc. has recently switched at least partly from older technologies using fossil fuels to
new technologies powered by electricity. The question has been raised whether it can be concluded that
for a given level of output Delta's operation now causes less fossil fuel to be consumed than it did
formerly. The answer, clearly, is yes, since the amount of fossil fuel used to generate the electricity needed to
power the new technologies is less than the amount needed to power the older technologies, provided level of
output is held constant.
In the argument given, the two boldfaced portions play which of the following roles?
(A) The first identifies the content of the conclusion of the argument; the second provides support for that
conclusion.
(8) The first provides support for the conclusion of the argument; the second identifies the content of that
conclusion.
(e) The first states the conclusion of the argument; the second calls that conclusion into question.
(D) The first provides support for the conclusion of the argument; the second calls that conclusion into
question.
(E) Each provides support for the conclusion of the argument.