The Clinician Says Either "Red" or "Green" to the Patient

The clinician says either "Red" or "Green" to the patient, waits 10 seconds, then asks the patient "What word did I say?" The clinician repeats this test 20 times, varying "Red" and "Green" randomly. The patient responds correctly only 3 times. What is a likely conclusion?

A) mild short-term memory deficit
B) severe short-term memory deficit
C) aphasia
D) malingering