In hot environment, some changes occur in the human body to improve heat tolerance, which is called heat acclimatization. The following suggested statements describe the physiological adjustments during heat acclimatization:

A. Vasoconstriction starts in skin at a lower body temperature.

B. Salt concentration in sweat is increased.

C. The sweat secretion over the skin is more effectively distributed for optimum use of the effective surface area for evaporative cooling.

D. The sweat glands maintain high output for longer periods.

E. The threshold for start of sweating is increased.

Which one of the following options represents the combination of the correct statements?