Which cancer screening is listed as having an A grade for adults?

• A. Breast cancer screening in average-risk women
• B. Colorectal cancer screening in adults
• C. Prostate cancer screening with PSA
• D. Lung cancer screening with low-dose CT

Answer: (B)

The main idea tested is how USPSTF grades reflect the strength of a screening recommendation. An A grade means high certainty that the net benefit is substantial, so the service should be offered routinely to eligible adults. Colorectal cancer screening has this top-grade support because multiple well-designed studies show that screening reduces both the incidence and mortality of colorectal cancer, and this benefit holds across several approved testing methods. The recommendation applies to adults in a broad age range, with specific intervals depending on the test chosen, making it a consistently strong, widespread option. Other cancer screenings listed have lower grades, reflecting either more limited net benefit or the need to tailor the decision to individual risk and harms, so they do not carry the A designation.