单项选择题

[听力原文]
Every color has a meaning. We have said that red is lovable. A red dress brings warmth and cheer to the saddest winter days. Color influences our moods. A yellow room makes most people feel more relaxed than a dark green one; light and bright colors make people not only happier but also more active. On the other hand, black makes people sad. A lot of people used to kill themselves on the black bridge over the Thames River. Until it was repainted green the number of self-murder attempts immediately fell sharply. If it had been painted in pink it would have fallen even more because pink is romantic.

Which color would have made the number of self-murder attempts fall even more sharply（）

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