18. For a seawater cooled condenser in a steam turbine power plant, which is the correct statement regarding the seawater temperature and the performances of condenser? (A) Low seawater temperature permits high vacuum of condenser. (B) Low seawater temperature permits high steam saturated temperature in condenser. (C) Low seawater temperature permits high steam dryness in condenser. (D) High seawater temperature permits high moisture rate of steam in condenser.