In what two-year period did radio ownership go from 60,000 to 1,500,000? a. 1922-23 b. 1939-40 c. 1916-17 d. 1954-55

i would say the answer is b. zigzag lines of the leaves. i believe this is the answer because zigzag lines go in different direction while the other options like: the vertical lines of the trees, the dotted lines on the road, and the curved lines of the park benches go in one direction.