During the Development of Lymphocytes, Some Pre-T and Pre-B Cells

Multiple Choice

During the development of lymphocytes, some pre-T and pre-B cells survive and develop into cells capable of an immune response; this is referred to as ________ selection. However, some cells are suppressed from responding to self antigens; this is referred to as ________ selection.

A) negative; positive
B) neutral; negative
C) negative; neutral
D) neutral; positive
E) positive; negative