A:may have
B:needn’t have
C:couldn’t have
D:must have
63,84,91,53,69,81,61,69,91,78,75,81,80,67,76,81,79,94,61,69,89,70,70,87,81,86,90,88,85,67,71,82,87,75,87,95,53,65,74,77.
在△ABC中,已知∠A=4∠B=104°,则∠C的度数是( )