The country girls were considered a menace to the social order. Their beauty shone out too boldly against a conventional background. But anxious mothers need have felt no alarm. They mistook the mettle of their sons. The respect for respectability was stronger than any desire in Black Hawk youth.

How does this passage support the theme "following social rules leads people to avoid risk”?

The country girls learn the American ways of life through their contacts with the Black Hawk men and their mothers.
The country girls are portrayed as vibrant and beautiful, while the Black Hawk men are portrayed as conventional and afraid of risks.
The country girls are portrayed as dangerous, which is why the men and their mothers are afraid of them.
The Black Hawk men learn to take risks and go against convention by meeting the country girls.

According to the question, country girls were considered a menace to social order because they were beautiful and mothers were anxious for their sons but their sons proved them wrong by having great self respect and holding it above any of their Black Hawk desires.

The passage supports the theme "following social rules leads people to avoid risk” by portraying the Black Hawk men learn to take risks and go against convention by meeting the country girls.