What is satirized in this excerpt from mark twain's "the £1,000,000 bank-note"?

i was pretty nervous, in fact, pretty badly frightened, though, of course, i was no way in fault; but i knew men well enough to know that when they find they've given a tramp a million-pound bill when they thought it was a one-pounder, they are in a frantic rage against him instead of quarreling with their own near-sightedness, as they ought.

the carelessness and short-tempered nature of british folks
people's willingness to pick quarrels over small matters
the lack of trust and respect englishmen had for americans
the nature of people to blame others for their own mistakes or shortcomings
the inability of people to trust others in matters involving money

the nature of people to blame others for their own mistakes or shortcomings

Explanation:

You can see how the author makes fun of it and points out this behavior in this part of the excerpt:

"[...] I knew men well enough to know that when they find they've given a tramp a million-pound bill when they thought it was a one-pounder, they are in a frantic rage against him instead of quarreling with their own near-sightedness[...]"

They would not blame themselves for giving away that money. They'd not even think about how they were the ones to commit such mistake. They'd blame the one that had the note because otherwise, it'd be their fault.

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hope this !

a simple sentence must have at least one dependent clause.