I judge by the car he drives. I’d say he’s got a pretty good job.

A. Because I judge by the car he drives, I’d say he’s got a pretty good job.

B. When I judge by the car he drives, I’d say he’s got a pretty good job.

C. Unless I judge by the car he drives, I’d say he’s got a pretty good job.

D. Judging by the car he drives, I’d say he’s got a pretty good job.