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.