I am going to have to go with C. Because someone wgo may have heat exhaustion will be dehydrated and may have dry skin due to being dehydrated. But don't take my word for it, that is just a guess!!
Which Of The Following Signs May Indicate Heat Exhaustion? A. Hunger, Fatigue, And Back Pain B. Muscle Cramps, Fatigue, And Lightheadedness C. Lethargy, Thirst, Nausea, Dry Skin D. Overexcitability, Inability To Sleep