单项选择题

某人氧耗量为300ml/分,动脉氧含量为20m1/100ml血,肺动脉氧含量为15m1/100ml血,心率为60次/分, 试问他的每搏输出量是多少?

A.1m1
B.10m1
C.60m1
D.100m1
E.200Ml