A group of African-American children have their hands up in the air singing or shouting in a classroom .
It is probably the case that a group of children are screaming and shouting because they are scared .
There is almost no chance that a group of children are screaming and shouting because they are scared .
It is probably the case that a group of children are screaming and shouting because they are scared .
A group of children are screaming and shouting because they are scared .