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.
--------
Question: Question: In what time will a train 200 m long cross an electric pole, it its speed be 144 km/hr?

Option A: 2 sec

Option B: 2.7 sec

Option C: 3.5 sec

Option D: 5 sec

Option E: 9.5 sec

Answer: Option D

Question: Question: When positive integer k is divided by 5, the remainder is 2. When k is divided by 6, the remainder is 5. If k is less than 24, what is the remainder when k is divided by 7?

Option A: 2

Option B: 5

Option C: 6

Option D: 3

Option E: 8

Answer: Option D

Question: Question: The profits of QRS company rose 50% from March to April, then dropped 20% from April to May, then rose 50% from May to June. What was the percent increase for the whole quarter, from March to June?

Option A: 15%

Option B: 32%

Option C: 40%

Option D: 62%

Option E: 80%

Answer:
Option E