You are given a math word problem and you are supposed to make use of mathematical concepts like probability, combinatorics, linear equations, sequences/series, or simple operators like addition, subtraction, division, or multiplication to answer the given question. Choose the best option from the 5 given options and report that option.

Ex Input:
Question: The cross-section of a cannel is a trapezium in shape. If the cannel is 16 m wide at the top and 4 m wide at the bottom and the area of cross-section is 700 sq m, the depth of cannel is?

Option A: 76

Option B: 28

Option C: 27

Option D: 80

Option E: 70

Ex Output:
Option E

Ex Input:
Question: A certain car's price decreased by 2.5% (from the original price) each year from 1996 to 2002, during that time the owner of the car invested in a new carburetor and a new audio system for the car, which increased car's price by $2,000. If the price of the car in 1996 was $22,000, what is the car's price in 2002?

Option A: $18,400

Option B: $19,500

Option C: $20,200

Option D: $20,700

Option E: $21,100

Ex Output:
Option D

Ex Input:
Question: A certain store sold pens for $0.35 each and pencils for $0.25 each. If a customer purchased both pens and pencils from the store for a total of $3.00, what total number of pens and pencils did the customer purchase?

Option A: 8

Option B: 9

Option C: 10

Option D: 11

Option E: 12

Ex Output:
Option C