TOEFL Reading: ETS-TOEFL阅读机经 - TNO0941XVR1H1XO5L$

Which of the sentences below best expresses the essential information in the highlighted sentence in the passage? Incorrect choices change the meaning in important ways or leave out essential information. A. Because smaller particles tend to stay trapped in the fast-moving air, they are blown much farther than other grains. B. Smaller particles are trapped by the stigma when fast-moving air flows past it. C. Small particles that are whisked past the waiting stigma gain speed and are often trapped in the fast-moving air. D. While smallness helps pollen travel farther, it also makes it more likely to be blown past the stigma.