You Palpate a Soft, Slightly Tender Mass in the Right

You palpate a soft, slightly tender mass in the right scrotum of a man. You attempt to reduce the size of the mass, and there is no change in the mass size. Your next assessment maneuver is to

A) use two fingers to attempt to reduce the mass.
B) palpate the left scrotum simultaneously.
C) lift the right testicle, then compare pain level.
D) transilluminate the mass.
E) culture the meatus for gonococcal infection.