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