Answer:
b. Asian American
Explanation:
Asian american is the ethnic group in which the children mostly likely to grow up with the two parents and least likely to be born to the single mother.
Now a days, there are very independent mothers who can be seen working on their laptops and anywhere and as single mothers doing the best for them. Single parenting is difficult but feasible.
Different ethnic groups like native american or the caucasian European, single parenting is often common.