did you ever find out the answer
I believe the answer is E. d41 because it goes a11, A12, b21, B22, c31, C32, then it goes lowercase d41 and then the next one is going to upper case D42.
Hope this helps.
Answer:
These pull more water in towards their center of mass. This causes water to pile up in small but measurable bumps.
I think it's B but I'm not to sure. hope that at least kinda helps.
