As our factory is now running at full______to meet heavy demands

As our factory is now running at full______to meet heavy demands abroad, your early decision is absolutely necessary.
A、capability
B、capacity
C、probability
D、ability
【正确答案】：B
【题目解析】：capaclty表示“生产量，生产能力”，at full capacity表示“以全部力量，满负载”。