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