Which of the following best describes the organization of the argument that the author of

the passage presents in the last two paragraphs？

A．Two approaches to testing a hypothesis is described,and the greater merits of each approach are compared.

B．The assumptions underlying a hypothesis all outlined,and evidence for and against the hypothesis is discussed.

C．A phenomenon is described, and hypothesis concerning its occurrence are considered and rejected.

D．A hypothesis is discussed, evidence supporting the hypothesis is revealed and qualified, and a working model derived from the hypothesis is suggested.