There are three blocks, A, B and C. Block A has one medium yellow square and one medium black square. Below the medium black square is the medium yellow square. Below block A we have block B which has one medium yellow square. Below block A there is block C. It has a medium blue square and a medium black square. Below the medium black square there is the medium blue square.
Which object is below a medium yellow square? the medium black square that is in block A or the medium black square that is in block C?
the medium black square  that is in block A the medium black square  that is in block C both of them none of them