Answer:
Citation analysis
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Because they wanted to expend their territory
Congress enacted the CRIRA in 1980, giving the US attorney general legal standing to bring suit in federal court on behalf of persons institutionalised by the states under unconstitutional conditions. Institutionalised persons almost lacked the resources and the ability to protect constitutioanl and federal statutory rights to adequate living conditions. CRIPA was needed because several federal court cases in the late 1970s denied the attorney general standing absent express statutory authority.
B and C. These are both benefits, the other two just don't have anything to do with what the question is asking.
