问题详情

The author implies in the tenth paragraph that
A．Americans can"t wag their fingers because carnivorous diet is unhealthy for the bones.
B．Americans don"t have the right to criticize other nations" unhealthy eating habit.
C．Americans should account for the largest portion of green house gas emission.
D．Americans prefer to eat meat because they believe that meat has more nutrition.请帮忙给出正确答案和分析，谢谢！