What is the theme of the story, "The Difficulty of Crossing a Field" by Ambrose Bierce?

I believe the theme of the story revolves around truth and how it can be defined or changed by those who have more power.

Explanation:

Ambrose Bierce's "The Difficulty of Crossing a Field" is a one-page short story. A man named Williamson is crossing a field when he suddenly disappears. However, only two people are listened to and believed when it comes to this strange fact - Mr. Wren and his son. But most importantly, Mr. Wren and his son are white men who own some land. Williamson's own wife and the slaves working on the field are not listened to or believed at all. The wife is even said to have lost her mind. The inferiority of Africans and women is clearly shown - and let's make it clear that Bierce is criticizing such an action. Everyone saw his disappearance, everyone came up with different explanations to it, but the woman and the slaves were not considered worthy of being heard and trusted. The "truth" in the end is something chosen, established by a few.

b. failure at least that one seems the most negative out of all of the answers provided pls correct me if i'm wrong. : ))