PI controllers can eliminate constant disturbances from the

PI controllers: can eliminate constant disturbances from the output but they cannot increase the Bandwidth of the loop. can eliminate constant disturbances from the output and always increase the Bandwidth of the loop. cannot eliminate constant input disturbances from the output but they increase the Bandwidth of the loop. can eliminate constant disturbances from the output and always decrease the Bandwidth of the loop. None of the above.

Solution

in case PI controller, adiition of dominant pole due to which steady state error reduces.

but speed of system decreses.

thus they can eliminate distubances but they can not increases bandwidth.

i think option A is correct