The correct answer is C) It removes the distillate condensed in area "24". The primary function of item '15' shown in the illustration MO-0111 is to remove the distillate condensed in area "24" of the system. This is the correct answer based on the typical operation and components of a distillation system, where the condensed distillate is collected and removed for further processing or storage. The other answer choices are incorrect because: A) the chemical cleaning pump is typically a separate component, not labeled as item '15'; B) removing vapor condensation is generally handled by a different component; and D) emptying the evaporator section is not the primary function of item '15' in this particular illustration.