IN_A_STEAM_ENGINE,_ONE_METHOD_OF_OBTAINING_THE_EARLIER_CUT-OFF_WITH_A_SIMPLE_SLIDE_VALVE_IS_BY_INCREASING_THE_ANGLE_OF_ADVANCE_OF_THE_ECCENTRIC_WHILE_THE_THROW_OF_THE_ECCENTRIC,_STEAM_LAP_AND_EXHAUST_LAP_ARE_KEPT_CONSTANT._THE_METHOD_WILL?$

• A. cause withdrawing or throttling of steam
• B. reduce length of effective stroke of piston
• C. reduce maximum opening opening of port to steam
• D. all of the mentioned