How are data marts different from data warehouses?

Multiple choice question.

Data marts focus on an individual department or business function and manage less data than a data warehouse.

Data marts are stand$-$alone, departmental data systems, while data warehouses are an integrated, enterprise$-$level system.

Data marts combine data from an organization$$s data warehouse with new data obtained from other sources.

Data marts contribute to an organization$$s data warehouse by supplying the data from one department or function.