Because the cork stoppers in wine bottles can leak

NandishSS wrote:Because the cork stoppers in wine bottles can leak, crumble, or become moldy, winemakers must often discard a significant proportion of their inventory of bottled wine. Bottlemaster, Inc., produces a plastic stopper that cannot leak, crumble, or mold. Bottlemaster's plastic stopper is available to winemakers for a price only slightly higher than that of traditional cork stoppers, and cork prices are expected to rise considerably in the near future. Therefore, Bottlemaster's plastic stopper will increase its share of the market for wine-bottle stoppers.

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

A)The first and the second each provide evidence to support the conclusion of the argument.

B)The first presents information that, in light of other information presented, provides evidence to support the conclusion of the argument; the second is that conclusion.

C)The first is evidence that has been used to support a position that the argument opposes; the second is the conclusion of the argument.

D)The first is evidence that has been used to support a position that the argument opposes; the second provides evidence to support the conclusion of the argument.

E)The first is a claim that the argument challenges; the second is a conclusion on which that challenge is based.

Source:GMATPrep EP2

OA:B

Please explain the line of reasoning