How do the lengths of the sides in the original figure compare to the lengths of the sides in its image? how do you know? A. THEY are different sizes, i can count the square
b. They are different shapes. i looked at them
c. THEY are the same length. i can count the squares

Set $r$ is a set of rectangles such that (1) only the grid points shown here are used as vertices, (2) all sides are vertical or horizontal and (3) no two rectangles in the set are congruent. if $r$ contains the maximum possible number of rectangles given these conditions, what fraction of the rectangles in set $r$ are squares? express your answer as a common fraction.