Something must be done to stop spam. In early days, people seldom received unsolicited email advertisement; but now that numerous bulk email software and email address finders are developed to collect email address all around the world. Advertisers use email addresses to market their products and even sell such email lists to other advertisers. As a result, almost everyone ever get junk email, and sometime several and even tens of annoying emails a day. So, relevant anti-spam regulations should be framed to stop unsolicited advertising.
The two portions in boldface play which of the following roles?
A. Background that the argument depends on and conclusion that can be drawn from the argument.
B. Part of evidence that the argument includes, and inference that can be drawn from this passage.
C. Pre-evidence that the argument depends on and part of evidence that supports the conclusion.
D. Background that argument depends on and part of evidence that supports the conclusion.
E. Pre-evidence that argument includes and a method that helps to supports that conclusion.