Define PI and PID control in BAS and one key difference.

Define PI and PID control in BAS and one key difference.

• A. PI uses proportional and integral actions; PID adds a derivative term; derivative improves stability and response speed
• B. PI uses derivative term; PID uses proportional
• C. PI uses only integral; PID uses proportional and integral
• D. PI uses only proportional; PID uses derivative term only

Answer: (C)