Which is true in these following situations(情况)?
选项：

A: When we found a big fire nearby, we should call 110 for help.
B: When there is a thief who is stealing things in the shop,we can call the police on 114.
C: When a man suddenly felt very sick,we need to call 119 at once.
D: When a man fell down from a big tree and was badly hurt, we need to call 120.