The correct answer among the choices given is option B. The purpose of an expectorant is to liquefy mucous. An expectorant is a drug that aids in the clearance of mucus in the respiratory system. It thins out mucus so it can be expelled from the body easier.
Treaty of Fort Laramie Two years after the Treaty of Fort Laramie, several southern Plains nations signed a treaty at (this place) in Nebraska.
