According to the text, which is NOT necessary in order to get the full flavor of food?

While chewing food allows the chemicals to quickly travel to the olfactory receptors, the text does not state that one must chew slowly. In this case, this option is not necessary in order to get the full flavor of food.
Your brain must receive information from taste buds and olfactory receptors is incorrect. In paragraph 3, it is stated that the full flavor of what is being eaten occurs when the brain gets information from both the olfactory receptors and the taste buds. This is a necessary component of getting the full flavor of food and is an incorrect choice for the question.
Using your sense of smell is incorrect. Using a sense of smell is necessary for getting the full flavor of food, as stated in paragraph 3, making this choice incorrect.
Chemicals must actively travel to the olfactory receptors in your nose is incorrect. As stated in paragraph 3, as food is chewed, chemicals quickly travel to the olfactory system, making this option incorrect.