What is immunological tolerance?

• A. The ability of the immune system to remove lymphocytes that recognize and attack foreign antigens.
• B. The ability of the immune system to differentiate between self and non-self antigens.
• C. The ability of the immune system to create antibodies that most effectively bind foreign antigens.
• D. The ability of the immune system to tolerate a certain amount of pathogens before triggering an immune response.