Which of these tests would the nurse expect to monitor for the evaluation of clients aged 18 and older with poor glycemic control?

D A glucose tolerance test, a fasting glucose and a glycosylated hemoglobin should be obtained at 6-month intervals after the initial assessment B A glycosylated hemoglobin is to be obtained at least two years A A glycosylated hemoglobin (A1c) should be performed during an initial assessment and during follow-up assessment, which should occur in longer than 3-month intervals C A fasting glucose and a glycosylated hemoglobin is to be obtained at 3 months intervals after the initial assessment