Question: To reinforce a paper project,
Options:
cut a piece of cardboard in equal size to the paper you want to strengthen, and glue the cardboard to the back of the paper design.
cut a piece of cardboard in equal size to the paper you want to strengthen, and glue the cardboard to the front of the paper design.
Answer: cut a piece of cardboard in equal size to the paper you want to strengthen, and glue the cardboard to the back of the paper design.