The solution that occurs in your mouth when you eat foods with a high salt content is called a hypertonic solution. This will make the correct answer C.
It depends on the type of drug you mean, such as medicinal drugs like marijuana, or bad drugs like cocaine or heroine. But the best answer(in my opinion) is B.
TRUE: Food that will be served immediately can be reheated to any temperature as long as the food was cooked and cooled properly. Food reheated for hot-holding must reach an internal temperature of 165℉ within two hours. The food needs to stay at this temperature for at least 15 seconds before serving.