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