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Verbal·Standard English Conventions·Form, Structure, and Sense

easy

While        a study that focused on how dogs respond to other dogs’ facial expressions, researchers monitored the dogs’ heart rates to ensure the dogs were not distressed by the experiments. The researchers reported that the dogs’ heart rates remained stable, suggesting they were relaxed during the experiment.

Which choice completes the text so that it conforms to the conventions of Standard English?

A

conducting

B

to conduct

C

conducts

D

conducted