Which group favors the government taking a prominent role in th economy and strongly supports civil rights for minorities and marginalized groups?

The answer to this question would most likely be the 'left-leaning group'. People who have left political tendencies usually talk about giving more power to the government in terms of the country's economy. They also strongly support civil rights for minorities and marginalized groups. This perfectly describes people with left political tendencies and is also the reason why this is the answer to your question.