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 Q]: Question: The parameter of a square is equal to the perimeter of a rectangle of length 16 cm and breadth 14 cm. Find the circumference of a semicircle whose diameter is equal to the side of the square. (Round off your answer to two decimal places)

 Option A: 77.14 cm

 Option B: 47.14 cm

 Option C: 84.92 cm

 Option D: 94.94 cm

 Option E: 23.57 cm
[EX A]: Option E

[EX Q]: Question: Rob traveled a distance of 30 km, covering the first 10 km in x minutes, the next 10 km in y minutes and the last 10 km in z minutes. If he totally took 3y minutes to cover the whole distance, then which of the following cannot be true? Assume x , y and z are different.

 Option A: z=3x

 Option B: x=3z

 Option C: y=2x

 Option D: x=2y

 Option E: y=3x
[EX A]: Option D

[EX Q]: Question: If the value of a piece of office decreases by 10% while the new tax rate on the office represent 110% of the original tax rate, what is the effect on the taxes?

 Option A: a - taxes increase by 10%

 Option B: b- taxes increase by 1%

 Option C: c- there is no change in taxes

 Option D: d- taxes decrease by 1%

 Option E: c- taxes decrease by 10%
[EX A]:
Option D