Q. Which of the statements are the advantages of closed loop systems over the open loop system:

• (A) the overall reliability of the open loop system is more than the closed loop system is more than closed loop system.
• (B) the transient response in closed loop system decays more quickly than in open loop system.
• (C) in open loop system closing the loop increases the gain of the system
• (D) in open loop system the effect of parameter variation is reduced