A 40-year old woman who has an operation and adjuvant chemotherapy fpr colon cancer is being monitored every 6 months. AT the latest visit, a blood test shows that she may have a recurrence of the cancer. The laboratory  finding most liekly to indicate this recurrence is an increased serum concentration of whichof the following (A) CA-125 (B) CD-10(CALLA) (C) Carcinoembryonic antigen (D) alpha Fetoprotein (E) Human Chorionic Gonadotropin

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