What Approach Is Appropriate for Interpreting the Prostate-Specific Antigen (PSA)level

Multiple Choice

What approach is appropriate for interpreting the prostate-specific antigen (PSA) level as a diagnostic factor for prostate cancer?

A) A PSA level higher than 4.0 ng/mL indicates prostate cancer.
B) A PSA level lower than 4.0 ng/mL indicates prostate cancer.
C) A fluctuating PSA level indicates prostate cancer.
D) An abnormal PSA level alone is not enough to diagnose prostate cancer.