A penetration tester completed a vulnerability scan against a web server and identified a single but severe vulnerability. Which of the following is the BEST wa...

A penetration tester completed a vulnerability scan against a web server and identified a single but severe vulnerability.
Which of the following is the BEST way to ensure this is a true positive?

A. Run another scanner to compare. B. Perform a manual test on the server. C. Check the results on the scanner. D. Look for the vulnerability online.