medium · Enhanced ACT reading

Consider the following sentence fragment from a draft about environmental science: 'Gazing through the microscope, the hidden world of tardigrades revealed its complex cellular structures to the stunned researchers.'

Which revision fixes the grammatical error while maintaining the same logical meaning?

  1. While gazing through the microscope, the researchers' findings revealed the tardigrades' complex structure.
  2. Gazing through the microscope, the stunned researchers saw the complex cellular structures of tardigrades.
  3. Gazing through the microscope, the tardigrades' complex cellular structures were revealed to the researchers.
  4. Gazing through the microscope, the hidden world of tardigrades was revealed in its complex cellular state.

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