单选题 The second paragraph uses facts to develop the basic idea that______

A、 a plant efficiently utilizes most of the water it absorbs
B、 carbon dioxide is the essential substance needed for plant development
C、 a plant needs more water than is found in its composition
D、 the stronger the wind, the more the water vapor loss'

【正确答案】 C

【答案解析】第二段第一句指出，然而，植物体内的实际水分只是流经植物水分的——小部分。