Specify whether the boiling point, as determined in the miniscale boiling-point apparatus, is the temperature a. of the liquid at the timebubbles first emerge slowly from the liquid. b. at the vapor-liquid interface above the surface of the boiling liquid while a drop of liquid c. is suspended from the thermometer. d. of the liquid at the timebubbles emerge rapidly from the liquid. e. of the heating source at the timebubbles emerge rapidly from the liquid.