A research participant hears a tone, which is followed by a puff of air directed toward his eye. Later, he blinks when he hears the tone. Before ending the experiment, what could the researcher do in order to extinguish the blinking to that tone?
A. Repeatedly present the tone alone
B. Repeatedly present the puff of air alone
C. Increase the loudness of the tone
D. Increase the amount of air that is directed toward the eye
Answer: A
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