To Be Effective, Control Systems Must : A$.$ Be Based On Subjective Standards B$.$ Communicate Needed Information Upward In The Organizationbc. Be Acceptable To Top Stockholdersd. Use Multiple Approaches E$.$ Centralize Decision Makingto be effective, control systems must :a$.$ be based on subjective standardsb. communicate needed information upward in the organizationbc. be acceptable to top stockholdersd. use multiple approachese. centralize decision making