【单选题】Starting a large propulsion diesel engine using diesel fuel during cold weather conditions can be made easier by ______. prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace>
A.
heating the engine jacket water
B.
increasing the lube oil pressure prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace>
C.
heating the engine fuel supply
D.
increasing the quantity of starting air prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace>