A tall tree can transport a hundred gallons of water a day from its roots deep underground to the treetop. Is this movement propelled by pulling the water from above or pushing it from below? The pull mechanism has long been favored by most scientists. First proposed in the late 1800's, the theory relies on a property of water not commonly associated with fluids: its tensile strength. Instead of making a clean break, water evaporating from treetops tugs on the remaining water molecules, with that tug extending from molecule to molecule all the way down to the roots. The tree itself does not actually push or pull; all the energy for lifting water comes from the sun's evaporative power.

25.  The passage is primarily concerned with

A.      refuting a hypothesis advanced by scientists

B.      discussing the importance of a phenomenon

C.      presenting a possible explanation of a phenomenon

D.      contrasting two schools of thought

E.      discussing the origins of a theory

여기서 형성이 샘 답지에 의하면 c가 정답이라는데 저는 아무리 분석해도 a같거든요

마지막 문장에 push나 pull은 없고 태양에 의한 증발로 일어난 것이라고 반박한 걸로 보여서

a라고 계속 생각이 드는데

제 생각이 틀렸으면 어디가 틀렸는지 알려주시면 정말 감사하겠습니다

이 문제는 구글링해도 잘 안나오네요 ㅠ