There are three blocks, A, B and C. A medium black square is in block A. This block also contains a small black square. The medium black square is touching the small black square. To the right of block A we have block B which contains one small blue triangle and a big black triangle. The small blue triangle is touching the bottom edge of this block. It is to the left of and below the big black triangle. To the left of block B there is block C with a big yellow triangle and one medium blue square in it. The big yellow triangle is to the right of and above the medium blue square.
What is to the left of the thing that is touching the bottom edge of a block? a medium black square or a object that is touching the left edge of a block?
medium black square  object that is touching the left edge of a block  both of them none of them