There are three blocks. We call them A, B and C. Block A contains a medium yellow square and one medium blue square. The medium yellow square is touching the bottom edge of this block. This object is below the medium blue square. Block B is below block A. It has a medium blue square. The medium blue square is touching the bottom edge of this block. This block also has a medium black square. Below the medium black square is the medium blue square. To the right of block B there is block C with a medium black square in it.
Which object is below a medium black square? the medium blue square which is in block A or the medium blue square that is touching the bottom edge of a block?
the medium blue square  which is in block A the medium blue square  that is touching the bottom edge of a block  both of them none of them