Realizing that the mental barriers of being scared to be wrong or too slow were getting in the way and stopping his kids from even attempting to solve problems, Gallin decided to change his approach.
3 boxes of 6 books and 2 boxes of 18 books
The correct option will be: C. 
<em><u>Explanation</u></em>
The repeating decimal given is:
which means 2.1111111111..........
Suppose, the given number 2.1111111111.......... as 
Here the repeating digit is 1 . First, we need to move the decimal point after the repeating digit. So we can do that by multiplying both sides by 10. Thus....

Now subtracting the above two equations , we will get.....

So, the given repeating decimal be expressed in a fraction as 