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