I've just sat here & posed this question to MM (but for the sake of my health we wont discuse the answer
) .
I also thought could this be a trick question
it might be a foreign bus ( it would help my answer).
When you look at it the answer does stare you in the face
but how do they know I mean you pass any school in the morning & theres shed loads of cars dropping the little darlings off
so how do they know about BUSES
.