F1 flies all short-winged and F2 flies all normal-winged
F1 flies all normal and F2 flies all short-winged
F1 flies all short-winged and three-quarters of F2 flies are short-winged
F1 flies all normal-winged and three-quarters of F2 flies are normal-winged
Correct answer is D
No explanation has been provided for this answer.
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