When Ann went to her doctor, he gave her a hearing test. During the test, the doctor presented tones to Ann through earphones. The tones started at a low intensity and then became louder. The doctor asked Ann to raise her hand whenever she heard a sound. The doctor was testing Ann's __________.
A. auditory stimulus convergence
B. auditory absolute threshold
C. auditory sensory threshold
D. auditory difference threshold
Answer: B
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