Which Is the Correct Breakdown and Translation of the Underlined

Which is the correct breakdown and translation of the underlined term below? Imaging:
Transabdominal ultrasound revealed significant postvoid residual. Consistent with bladder outlet obstruction.
Cystoscopy to r/o urethral stricture was normal.

A) cysto (bladder) + scopy (looking procedure) = process for examining the bladder
B) cysto (bladder) + scopy (recording procedure) = process for recording/imaging the bladder
C) cysto (kidney) + scopy (looking procedure) = process for examining the kidney
D) cysto (kidney) + scopy (recording procedure) = process for recording/imaging the kidney