Which of the following effects are correct in respect of addition of a pole to the system

Question:

Which of the following effects are correct in respect of addition of a pole to the system loop transfer function?

1. The root locus is pulled to the right.

2. The system response becomes slower

3. The steady state error increases

Of these statements:
(a) 1 and 2 are correct
(b) 1, 2 and 3 are correct
(c) 2 and 3 are correct
(d) 1 and 3 are correct.