The heated feed-water entering any flash chamber of a flash-type evaporator will（）
A. vaporize, with the un-flashed water remaining at the temperature at which it entered the flash chamber
B. vaporize, with the un-flashed eater equalizing to the saturation conditions existing in the f lash chamber
C. vaporize, with the remaining water a t a temperature greater than it entered the flash chamber
D. boil, allowing steam bubbles to rise through the brine at the bottom of the flash chamber
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