ANS:A - decreased capacity.

Increasing the liquor level in the evaporator typically does not result in decreased capacity. Instead, it usually leads to increased capacity. When the liquor level in the evaporator is increased, it means there is more liquid present in the evaporator vessel. This increased liquid volume allows for more heat transfer area and can accommodate more liquid to be heated and evaporated. As a result, the evaporator can process a larger volume of liquid, leading to an increased capacity to evaporate. Therefore, increasing the liquor level in the evaporator generally results in increased capacity, not decreased capacity.