Detailed Instructions: In this task, you are given a context and four options. Each option is a suggested ending for the context. You should read the context and pick the best ending for the context. Please answer with "A", "B", "C", and "D". 
Q: [header] How to do grade 9 mathematical processes [title] Do operations with fractions. [substeps] Add and subtract. Fractions can only be added, or subtracted, if they have the same denominator, otherwise the answer is incorrect. <sep> (A) As you like to think, the outcome is the same, even if fractions are separated differently. For example, the number 3 expressed in fractions is 52. (B) Add and subtract fractions from fractions to mathematical processes as these variables are formatted in the ways shown before. For larger fractions, add fractions to the fractions and subtract fractions from the fractions to multiplying the fraction. (C) 1 fraction equals 3, which is going to yield no equal part in the formula. This is all fractions at four cups. (D) For example , 2/5 + 1/5 = 3/5. To add or subtract fractions with different denominators, the first step is to find the lowest common denominator.
A:
D