Which of the following modal verbs doesnt express ability？A．Andy can speak French very tho

Which of the following modal verbs doesnt express ability？

A．Andy can speak French very though she"s bad at English.

B．There were so many things to do that no one could finish them.

C．I can persuade him to take part in the sports meeting.

D．The hunters could starve as they have been lost for days.

请帮忙给出正确答案和分析，谢谢！