During post-procedure inspection, a technician notices the endoscope's biopsy channel has a slight brown discoloration that does not flush out. What is the most appropriate next action?
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A
Proceed with reprocessing using increased chemical exposure time
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B
Remove the scope from service and report to the supervisor for further evaluation
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C
Use a stiffer brush to scrub the discoloration during manual cleaning
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D
Document the finding and return the scope to the procedure room