TOEFL Listening: TPO-TOEFL阅读TPO - 19E3F519S54SALB9N$

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. A light microscope has the power to greatly magnify a bacterium that is smaller than 0.2 micrometers. B. A light microscope can only resolve objects 0.2 micrometers or larger, so it cannot show the interior form of a cell. C. The smallest bacterium has a complex internal structure that can be seen with a light microscope. D. The greater the magnifying power of a light microscope, the greater its ability to resolve the internal structure of a cell.