26. Doctors now believe that many of the illnesses and health problems people suffer from aresimply caused by dehydration, or a shortage of water in the body.
(A) If people had a drink of water more often, they would eat much less to reduce the opportunityto become overweight.
(B) Most people may encounter the problem at least some of the time although they are probablynot aware of it.
(C) In fact, if you feel thirsty at all, you are already suffering from the first stages of dehydration.
(D) Dehydration is even more of a problem for the elderly, because our sense of thirst becomesless effective as we get older.¯