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