Answer:
Each side of the original square is 4 times the length of each side of the scale model.
Explanation:
A square is a 2 dimensional shape that has all sides to be equal. The sides can be increased or decreased generally by a process called scalling. In this question, using a factor of 4 implies that each side of the original square was reduced by a factor of 4 to creat the scale model.
Therefore, each side of the original square is 4 times the length of each side of the scale model is the appropriate option.