Punctuation in Research Statement

Very Hard Usage And Mechanics Punctuation

Choose the option that correctly punctuates the following sentence:

The professor noted that the research conducted on climate change whilst thorough, was still lacking in several key areas.

The professor noted that the research conducted on climate change, whilst thorough was still lacking in several key areas.

The professor noted that the research conducted on climate change, whilst thorough, was still lacking in several key areas.

The professor noted that the research conducted on climate change whilst thorough, was still lacking in several key areas.

The professor noted that, the research conducted on climate change, whilst thorough, was still lacking in several key areas.

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