The Shape-Pattern Theory of Olfaction Is Based on the Idea

The shape-pattern theory of olfaction is based on the idea that

A) every perceived smell has a different vibrational frequency.
B) the olfactory receptors can change their shapes to fit the odorants' shapes.
C) the firing pattern of neurons in the olfactory bulb is not important to odor perception.
D) the olfactory bulb recognizes specific patterns of odors.
E) odorants' shapes fit into the olfactory receptors' shapes.