Answer: B. Language.
Step-by-step explanation: similes, metaphors and allusions are figures of speech, similes and metaphors are comparison between elements that aren't obviously related (similes use the words "like" and "as" to make a comparison and metaphors don't, this last ones are direct comparisons), and allusions are brief references to persons, places or events (historical, political, cultural, etc). The use of these literary device is an example of language choices, so the correct answer is option B.