I had to look for the excerpt attached to this question, and here is my answer:
The speaker in the excerpt given was Grendel and here, he was describing about himself at how he reacts and acts in times of arguments. Based on this excerpt above him, this shows that he is just PRACTICAL based on how he responds to the given situation.
The correct answer is became.
'Has become' is incorrect because we have a limited time (during the 19th century), and present perfect tense means that the action is still happening in the present. 'Becomes' is incorrect because this happened in the past. 'Had become' is incorrect because you use past perfect tense only before something else happened in the past. 'Would became' is incorrect because it should be would become.
Answer: Fact
Explanation: I live in Canberra.
The Raven by Edgar Allan Poe