Which of the Following Statements About Olfaction Is FALSE

Which of the following statements about olfaction is FALSE?

A) Each olfactory receptor can bind multiple types of odorants.
B) Each odorant can bind to multiple olfactory receptors.
C) Once an odorant is bound to a receptor that receptor is desensitized and does not respond to another odor for a period of time.
D) The threshold for detection of odors is extremely high so it takes quite a lot of odorants bound to an olfactory neuron to initiate an action potential.
E) Olfaction is the only major sensation that is relayed directly to the cerebral cortex without first passing through the thalamus.