Which of the following is a pattern that takes many years to observe?

A.A catipillar turning into a butterfly-i think this is wrong
B.Weather patterns revealing earths climate- this might be right
C.A weater front bringing a cold winter storm- it maight be right
D.The sun rising in the the east and setting in the west- i think this is wrong cause it is to short

By George! I think you've got it!

is it b or cccccccc

outer space