We have three blocks, A, B and C. Block A is to the right of C and block C is to the right of B. Block A contains a medium black square and a medium blue square. The medium black square is touching the bottom edge of this block. It is below the medium blue square. Block B contains one medium black square. Block C contains a medium yellow square, one medium blue square and one medium black square. Below the medium blue square and the medium black square there is the medium yellow square. The medium blue square is below the medium black square.
Which object is above a medium square? the medium black square that is in block C or the medium black square that is in block B?
the medium black square  that is in block C the medium black square  that is in block B both of them none of them