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