Question

immunizations expose people to which substances?
a t cells

b dead or inactivated antigens

c b cells

d antibodies from another organism

Explanation:

Immunizations work by exposing the body to dead or inactivated antigens (or parts of pathogens) to stimulate an immune response without causing the full - blown disease. T cells and B cells are part of the body's immune system, not the substances introduced in immunizations. Antibodies from another organism are used in passive immunity (e.g., in some antibody - based treatments) and not the main mechanism of immunizations which aim to trigger the body's own immune response through antigens.

Answer:

b. Dead or inactivated antigens