Researchers Have Suggested a Fifth Taste in Humans Known as Umami

Researchers have suggested a fifth taste in humans known as umami and attribute the taste to the compound glutamate.Which of the following would support the belief that umami is a real taste?

A) identifying a chemoreceptor in the nasal cavity that glutamate can bind to
B) the isolation of a sensory neuron that creates nerve impulses in response to pressure from glutamate
C) finding chemoreceptors in a taste bud that create nerve impulses in response to an interaction with glutamate
D) identification of glands in the oral cavity that release saliva in response to the presence of glutamate