You Are a Doctor Examining a Patient's Blood-Test Results

You are a doctor examining a patient's blood-test results. The patient's T cell count is low. You are concerned that the patient will:

A) be susceptible to infection by all types of bacteria.
B) have low antigen levels from decreased B-cell activity.
C) have strong allergies.
D) have a reduced ability to kill host cells if she becomes infected.
E) develop cancer.