问题详情

A．Out of the 15 confirmed human cases of bird flu in China last year, there were 8 deaths.
B．Out of the 15 confirmed human cases of bird flu in China last year, there were 10 deaths.
C．Out Of the 34 confirmed human cases of bird flu in China last year, there were 15 deaths.
D．Out of the 34 confirmed human cases of bird flu in China last year, there were 10 deaths.请帮忙给出正确答案和分析，谢谢！