单项选择题

A.破坏时最大力为依据,且破坏的延伸率不小于4%
B.破坏时抗拉力为依据,且破坏的延伸率不小于4%
C.破坏时最大力为依据,且破坏的延伸率不小于5%
D.破坏时抗拉力为依据,且破坏的延伸率不小于5%