Which of the Following Concerning Olfaction Is True

Multiple Choice

Which of the following concerning olfaction is true?

A) Olfactory receptors are highly modified neurons.
B) Molecules to be smelled cannot be dissolved first in mucus.
C) Humans have fewer than 10,000 olfactory receptors.
D) Human power of olfaction is as powerful as that of most other mammals.
E) Olfactory stimuli must pass through the thalamus before journeying to the olfactory cortex.