Ok, so:
We want to convert 1 (5/11) to a decimal.
For this, we do the following:
When we got this kind of fractions, we multiply the outside number by the denominator, and this one will be the denominator of the new fraction.
For the numerator, we multiply the outside number by the denominator and then we sum its numerator. This result will be the numerator of the new fraction.
So, as you can see, the result is 16/11, and this is 1.4545454545. We can express this number with other form because it is repeating:
So, A is the answer.