Which of the following statements are correct?1. A continuous-time system is said to be time-invariant if the parameters of the system do not change with time.2. The characteristics of a time-invariant system are fixed over time.3. If the input to the time-invariant system is delayed by t0 seconds, the characteristics of the output response are also delayed by t0 seconds.

• A. 1 and 2 only
• B. 1 and 3 only
• C. 2 and 3 only
• D. 1, 2 and 3