In literature, parallelism is used to create literature as alluring and memorable. In parallelism, the grammatical part of the sentence is the same and similar in construction. An entire sentence or phrase can be repeated for example, 'I have a dream' repetition by King make his speech rhythmic and memorable. It is a great tool to persuade by repetition by sentence and making it memorable for the reader.
Therefore, the quote which uses parallelism is,
A."The capital was abandoned. The enemy was advancing. The snow was stained with blood." -Barack Obama, inaugural address
Herein, the quote is in parallelism because it uses a similar construction of the sentence, 'The...was...'
Such repetition helps the listener to have in memory and is persuasive in nature.