Does the Presence of an AGN in a Galaxy Affect

Does the presence of an AGN in a galaxy affect star formation rates in the galaxy?

A) No. Star formation rates in galaxies with AGN are similar to those in galaxies of the same type and size without AGN.
B) Yes. The presence of an AGN and its jets sends out shock waves that cause star formation to occur at an elevated rate throughout the disk of the galaxy.
C) Yes. It has a negative effect. The presence of the AGN heats the gas and dust throughout the galaxy, thus making it less likely to collapse to form stars.
D) This question has different answers for different host galaxies. An AGN in a spiral galaxy causes increased star formation rates, but an AGN in an elliptical galaxy has no effect on the (very low) star formation rate.