Answer:
The literary device this passage most clearly shows is letter B. parallelism.
Step-by-step explanation:
Parallelism consists of the repetition of a certain grammatical structure inside a sentence. The purpose of such repetition is to avoid confusion, making the speech clear, interesting, and easy to be understood
In the passage, we find the repetition of a specific group of words in "proud of the straight lines he did not will, proud of the tractor he did not own or love, proud of the power he could not control." Notice that this repetition consists of an identical cluster of words - "proud of" - spoken three times, followed by similar structures with article +(adjective) noun + pronoun + auxiliary verb + not + verb. The fact the we have the same structure repeated inside a sentence constitutes parallelism.