Why did the balloon attempt fail？A．It twisted and the helium at the top came under pressur

Why did the balloon attempt fail？

A．It twisted and the helium at the top came under pressure, causing a seam to split.

B．The weather conditions were not perfect.

C．They had difficulty in inflating the balloon.

D．The Mission Controller stopped trying.

请帮忙给出正确答案和分析，谢谢！

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