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.

Input: Consider Input: Question: A car during its journey travels 30 minutes at a speed of 60 kmph, another 45 minutes at a speed of 80 kmph, and 1 hours at a speed of 70 kmph.The average speed of the car is

Option A: 63.07 kmph

Option B: 64 kmph

Option C: 75 kmph

Option D: 80 kmph

Option E: None of these

Output: Option D

Input: Consider Input: Question: Plaudia can choose any two of four different candles and any 8 of 9 different flowers for a centerpiece arrangement. Given these choices, how many candle + flower groupings can she select?

Option A: 54

Option B: 72

Option C: 96

Option D: 144

Option E: 432

Output: Option A

Input: Consider Input: Question: The ratio of two speeds of two trains is 3 to 4. If each of the trains slows its speed 5 km/ hr, what will be the ratio of these two train speeds ?

Option A: 3/4

Option B: 8/9

Option C: 18/19

Option D: 23/24

Option E: It cannot be determined from the information given
Output: Option E