Which statement about olfaction is not true ?

Options

A. Dogs are unsual among mammals, in that they depend more on olfaction than on vision as their dominant sensory modality
B. Olfactory stimuli are recognised by the interaction between the stimulus and a specific macromolecule on olfactory hairs
C. The greater the number of action potentials generated by an olfactory receptor, the greater the intensity of the perceived smell
D. The perception of different smells results from the activation of different combinations of olfactory receptors