A rescuer can most easily determine whether or not an adult victim has a pulse by checking the pulse at the（）.

A.the man has been missing for a period of time
B.the sea water is very cold and the man is visible
C.there is thick fog
D.the wind was from astern on the original course

A.reduced appetite and thirst
B.sneezing and coughing
C.only a low grade fever
D.slurred speech and loss of coordination

A.boric acid solution
B.water
C.baking soda solution
D.ammonia