Answer:
It could.
Explanation:
It really would depend if you still like the subject when you move on to the next grade. They could teach something other then what you liked next year like you learned about wars last year and then this year, you are learning about the whole world. So, it could guarantee A+ success forever.
B.industrialization I think that's the answer
I don't know what passage you're talking about, but I think that A would be a better choice. To me, B seems a little too specific to be a main idea. However, if the passage never discusses the kindness of others then I think that B is probably correct.