Many Television Chefs Will Season Their Food, Somewhat Liberally, with Salt

Many television chefs will season their food, somewhat liberally, with salt and pepper. On occasion you will even hear the remark, "Salt wakes up the flavor of the food." Why would the addition of salt help to heighten the "taste" of the food?

A) The salt changes the ion concentration in the mouth, activating salt-sensitive taste bud receptors and increasing the number of cells that depolarize and transduce other flavor signals to the brain.
B) It does not heighten the taste of the food; everything just tastes salty.
C) The salt can combine with the taste molecules so they bind more strongly to their receptors.
D) The salt causes more saliva to be produced, and that results in more taste molecules reaching the taste cells in the mouth.