The Salad Bowl analogy of U.S. society states that

O ethnic groups are entirely separated in U.S. society and have no influence upon one another.
O ethnic groups living in the U.S. retain unique features, but also contribute to American culture as a whole.
O all ethnic groups' cultures have melted overtime into one distinct culture.
O immigrants must abandon their traditions to be successful in U.S. society.

The correct answer is:

Ethnic groups living in the U.S. retain unique features, but also contribute to American culture as a whole.

The Salad Bowl analogy of U.S. society states that ethnic groups living in the U.S. retain unique features, but also contribute to American culture as a whole. This means that different ethnic groups maintain their distinct traditions, languages, and customs while also influencing and enriching the broader American society. Unlike the "melting pot" analogy, which suggests that all ethnic groups' cultures blend together into one homogeneous culture, the Salad Bowl analogy emphasizes the importance of diversity and cultural preservation. It recognizes that immigrants do not need to abandon their traditions to be successful in U.S. society.