请教t4-q32

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 fenerate the electricity needed
to power the new technologies is less than the amount needed to power the older
technologies, provided that the level of output is held constant.

In the argument
given, the two boldface portions play which of the following roles?

        
1. The first identifies the content of the
        conclusion of the argument; the second provides support for that
        conclusion.

        
2. The first provides support for the
        conclusion of the argument; the second identifies the content of that
        conclusion.

        
3. The first states the position that the
        argument opposes; the second states the conclusion of the argument.

        
4. Each provides evidence that calls the
        conclusion of the argument into question.

        
5. Each provides support for conclusion of
        the argument.