Problem number 14. A sheet of paper is folded in half. Square and round holes are punched here and here. What does the sheet look like after it is unfolded again? When the sheet is unfolded, we will have the other half of the paper here and this fold line will act kind of like a mirror. So whatever is closer to the line on this side will also be closer on the other side and whatever is further away will be further away. So this is what our sheet will look like. This corresponds to answer B.

paper folding

hole punching

reflection symmetry

unfolded sheet

mirror line