The final paragraph plays what role in relation to the rest of the passage?

A. It offers information that raises doubts about the conclusions expressed in the previous paragraph.

B. It discusses an alternative view to points stated as facts in the second paragraph.

C. It restates the question raised in the opening paragraph, using information offered in the second and third paragraphs.

D. It offers background information for the system described in the two preceding paragraphs.

E. It summarizes points raised elsewhere in the passage.