【单选题】

Which of the following best describes the organization of the passage
A．(A) A hypothesis is described, challenged by a second hypothesis, then disproved by research.

B．(B) A hypothesis is described, then confirmed by research, disproving a second hypothesis.
C．(C) A hypothesis is described, then established by research, then replaced by a second hypothesis.
D．(D) A hypothesis is described, then modified through research, then compared with a second hypothesis.
E．(E) A hypothesis is described, then abandoned after research, and replaced with a second hypothesis.