Ryn : Do you know about the illegal import of sugar that happened recently? Dave: Yes. But not much. I think the police……the importers and the official who Back

Ryn : Do you know about the illegal import of sugar that happened recently? Dave: Yes. But not much. I think the police……the importers and the official who Backed this illegal activity. Ryan : I agree with you . But they always have reasons not to be arrested.
Select one:
a.caught
b. have caught
c. are catching
d. would be caught
e. should have caught.