A Nurse Is Discussing the Role of Antibodies in the Complement

A nurse is discussing the role of antibodies in the complement system with a group of nursing students. Which statement by a student is correct?

A) "Antibodies activate the complement cascade by turning on the alternative pathway."
B) "Antibodies that are free in solution can activate the complement system."
C) "Antibodies flag target cells to be lysed by membrane attack complexes."
D) "Antibody receptors are nonspecific to antigenic determinants."