Base on my calculation and the simplification of the form and finding its 4th power of the x+2y, i came up with a solution and finally found an answer of B. 448x^5y^3, I hope i answer your questions directly and please feel free to ask for more and ask for clarifications
Answer:
statement B and C are true...hope this helps:)
Divide 56 by 2 and you get 28,therefore 28 chips per box

so,

it equals 12.49 or 12.5 depending on rounding
I hope this helps!