马克思主义政治经济学批判地继承了

A．资产阶级古典政治经济学的科学因素

B．资产阶级庸俗政治经济学的科学因素

C．小资产阶级政治经济学的科学因素

D．新自由主义经济学的科学因素

When launching a lifeboat，the tricing pennants should be released（）.

A.before the boat is lowered from the stowed position

B.as the boat-fall blocks break clear of the davit head

C.before the boat is lowered from the embarkation level

D.after the boat is released into the water