Answer:
topic sentences state the main idea.
Borges's story The Garden of Forking Paths can be considered to be a three dimensional chess game for a variety of reasons. First, like a game of chess, a nearly infinite number of possible outcomes are proposed through the story (just as how a chess game can allow for a variety of different outcomes). Also, chess is a game of choice, just as the Garden of Forking Paths - both the story itself and the novel of the same titles mentioned in the story - allows for the reader to, in essence, choose their own design and strategy. Furthermore, the lead character\protagonist in the story is manipulating events throughout the story to, in essence, score a "checkmate."
The correct answer is D. it uses imperfect coordinating structure.
Parallelism refers to the use of the same word form throughout a particular sentence. So, in the example above, in order to achieve parallelism, we would need to change the word 'vacuuming' into 'to vacuum,' in order to keep the consistency with the other two verbs: 'to dust' and '(to) straighten up.'
