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: Find the least number by which (59)(36)(17) has to be multiplied to obtain a perfect square?

Option A: 5

Option B: 17

Option C: 85

Option D: 221

Option E: 223
[EX A]: Option C

[EX Q]: Question: 3 + 3 + 3 + 2 3^2 + 2 3^3 + 2 3^4 + 2 3^5 + 2 3^6 + 2 3^7 =

Option A: 3^7

Option B: 3^8

Option C: 3^14

Option D: 3^28

Option E: 3^30
[EX A]: Option B

[EX Q]: Question: Two of his favorite buildings are Chicago's Sears (Willis) Tower and
Dubai's Burj Khalifa. If Burj Khalifa stands at 830 meters high and
Sears stands at 527 meters high, how much higher is Burj Khalifa than Sears?

Option A: 300

Option B: 250

Option C: 130

Option D: 303

Option E: 111
[EX A]:
Option D