Final answer:
The best reflection of the position that marrying whites is used as a criterion for the acculturation of Asian Americans is that Asian American families have remained quite isolated from the mainstream groups.
Step-by-step explanation:
The best reflection of the position that marrying whites is used as a criterion for the acculturation of Asian Americans would be option B: Asian American families have remained quite isolated from the mainstream groups.
Acculturation is the process of adapting to the beliefs and practices of a larger group. Intermarriage is often seen as a means of assimilating into the dominant culture. If the criterion for acculturation is marrying whites, it implies that Asian Americans have not fully integrated into mainstream society and may still be isolated.
This is supported by the information provided in the texts, which mentions the barriers to intermarriage and the discrimination faced by Asian Americans, including laws against interracial marriages. The mention of Asian Americans being discriminated against and denied their civil rights further supports the idea that they have not fully acculturated.