Oral rehydration salts are used to __________.
A.
purify air that has been polluted
B.
replenish moisture in the environment after natural disasters such as earthquakes
C.
purify water supplies to help minimize the risk of catching cholera
D.
help replenish fluids in the body after it suffers fluid loss from diseases such as cholera

Please select the best answer from the choices provided
A
B
C
D