C. If everyone thinks the price is too high you should lower it.
Answer:
i think D.Banister
Explanation:
I saw photos and a banister is on the stairways.
This is just a mathematics question but factoring is use a lot of times to make numbers smaller and easier to work with that is in the case of GCF 14(x^2 + y^3) you would multiply it out but it is easier to work with