If birds did not have wings, they would not have been able to fly
A. If birds did not have wings, they would not have been
B. If birds had no wings, they would not have been
C. Unless birds had wings, they would not be
D. If birds did not have wings, they would not be
E. Unless birds had wings, they would not have been
What's the correct option? I think the option C is right
If birds did not have wings, they would not have been able t
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