There are three blocks, A, B and C. Block B is to the left of A. Block C is below B. Block A has a medium blue square. There is also a medium black square touching the bottom edge of this block. The medium black square is below the medium blue square. Block B contains a medium blue square. A medium black square is below the medium blue square. And block C contains a medium yellow square. A medium black square is touching the bottom edge of this block. It is below the medium yellow square.
Which object is above a medium square? the medium blue square which is in block A or the medium blue square which is in block B?
the medium blue square  which is in block A the medium blue square  which is in block B both of them none of them