Final answer:
The most appropriate screening test to offer this patient would be a CA-125 test.
Step-by-step explanation:
Based on the given information, the most appropriate screening test to offer this patient would be a CA-125 test. The CA-125 blood test is used to detect ovarian cancer in women who have a higher risk of developing the disease, such as those with a family history of ovarian cancer or certain genetic mutations. Given that the patient's mother died from ovarian cancer, it is important to screen for this specific type of cancer.