#2 is correct.
Problems with the others:
#1 - best is a superlative (used to compare more than three or more things)
#3 - best is the greatest something can be so you cannot have more of it
#4 - you either use "more" OR "better" because "more better" would be just be the best
B.
Not A. because it isn't only for solving simple problems.
Not C. because it CAN work well with personal or school problems.
Not D. because you can't solve a problem before their is a problem.
I hope this helped.
Rectangle to box. A circle is the end of a cylinder while a rectangle is the end of a box. It helps describe the shape.
He doesn’t realize they are Montauges
Well which book because I have read many and havent heard of this one and would love to help you!