In olfactory rivalry research, one odorant is presented to one nostril and a different odor is presented to the other nostril, leading to findings that ______.
A. the two odors combine into an interesting mélange of odors
B. people reported smelling one and then the other, but not both at the same time
C. because of phase transitions, the two odors cancel each other out
D. only the smell presented to the dominant nostril is perceived
Answer: B
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