I think the answer is 121 pints, sorry if im wrong
Answer:
Answer is The 2nd elevator
Step-by-step explanation:
1st Elevator
5+12 = 17
17- 8 = 9
so 1st elevator ends on floor 9th
2nd Elevator
21-10 = 11
11+9 = 20
2nd Elevator ends on floor 20th
so therefore the elevator that ends on the higher floor is the 2nd elevator
ANSWER
A.

EXPLANATION
The given expression is

We split the middle term to obtain,

Factor to obtain

Factor further to get,

This is the same as;

The correct choice is A