C) I would say. You can learn many things from rollercoasters, like how much mass they can hold. The distance they go in a daily trip. Rollercoasters can be of use for science for a fun learning experience!
That you've been all around the world multiple times
I had to look for the missing detail for this question which I attached here.
And I would say that among the given images, the one that presents the identification of causal relationships would be the second one. Hope this answers your question.