Answer:
D
Explanation:
We need to double the amount of constructions built, EVERY YEAR
1st year: 6
2nd year: 6 * 2 = 12
3rd year: 12 * 2 = 24
4th year: 24 * 2 = 48
5th year: 48 * 2 = 96
So, in 5th year, the constructions built is 96 structures
From the answer choices, that would be "D"