Nemployment rates are a. lower for people without a high school degree than for college graduates, and vary greatly among ethnic groups. b. lower for college graduates than for people without a high school degree, and vary greatly among ethnic groups. c. lower for college graduates than for people without a high school degree, and vary little among ethnic groups. d. lower for people without a high school degree than for college graduates, and vary little among ethnic groups.

A. lower for people without a high school degree than for college graduates, and vary greatly among ethnic groups.

Explanation:

                "Unemployment" is a term coined for people who do not have a job to earn for their living. Unemployment is highly related to the qualification and skill sets people have.

                It is seen that people who do not have a high school degree are less likely to get an employment  when compared to people who have a college graduation degree. And it varies greatly among the ethnic groups.

Unemployment rates are seen more for people who do not any have any particular skill set that is required to work. Also academic qualifications is also an important criteria for getting employed.

Thus the answer is

A. lower for people without a high school degree than for college graduates, and vary greatly among ethnic groups.

A. lower for people without a high school degree than for college graduates, and vary greatly among ethnic groups.

Explanation:

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