Operational definitions allow researchers to:. A. Formulate hypotheses that can be tested during an experiment. B. Avoid the placebo effect in experimental settings. C. Measure the constructs they are interested in. D. Obtain informed consent from participants.

C. Measure the constructs they are interested in

Explanation:

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the earthquake in haiti was a magnitude of 7.0 according to the u.s geological survey yet the smaller earthquake in haiti killed more than 200,000 and left more than 1.2 million people homeless. the chile earthquake was a magnitude of 8.8 and 500 times more stronger but chile's earthquake only injured 712 people.