What are the advantages of Vertical Integration? There may be more than one correct answer.

A、Business risk will be decreased.;
B、An integrated company may be able to ensure a smoother flow of parts and materials for production than a nonintegrated company.;
C、Some companies feel that they can control quality better by producing their own parts and materials.;
D、Integrated companies realize profits from the parts and materials that they choose to make instead of buy.