题目内容
（请给出正确答案）
[主观题]
The third paragraph mainly tells us that ______.A．a network of centers has been quite effe
The third paragraph mainly tells us that ______.
A．a network of centers has been quite effective in reducing suicide
B．a network of centers help the callers to realize that suicide is a common social problem
C．people are making efforts to help those who tend to commit suicide and in a way, they are successful
D．in the US, people who want to commit suicide call a network of centers to get help
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