Parallelism

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Select the sentence that contains at least one problem involving parallelism (opens in separate browser), and then press the corresponding letter:

Item 1 of 5

This report examines the problem of CO₂ accumulation in the earth's atmosphere, the climatic changes caused by excessive CO₂ concentrations in the atmosphere, and the implications of these changes.
This report examines the problem of CO₂ accumulation in the earth's atmosphere, how excessive CO₂ concentrations in the atmosphere cause climatic changes, and the implications of these changes.
This report examines how CO₂ accumulates in the earth's atmosphere, how excessive CO₂ concentrations in the atmosphere cause climatic changes, and what are the implications of these changes.

Answer A Answer B Answer C

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