问题详情

What was (were) the last thing(s) that the disease specialists expected to meet ？
A)The enormous difficulties that they had to be confronted with.
B)The basic questions about whether bird flu could be controlled.
C)The possibility that the flu might be spread from human to human.
D)The laboratory tests result that Ginting was sickened by bird flu.请帮忙给出正确答案和分析，谢谢！