A sample of scores has a mean equal to M and a standard deviation equal to S. From each score in the sample one standard deviation (S) is subtracted. After this transformation, the standard deviation of the sample of scores is equal to:

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.

it is ram's horn i took the test got this anwser wrong due to the person above me !