Which of the following circumstances would provide the client with active natural immunity?

A) Acquiring tetanus and receiving tetanus toxoid
B) Having chickenpox
C) Rabies vaccine after being bitten by a dog
D) Injection of gamma globulin

Active natural immunity occurs when the body is naturally exposed to a pathogen and produces an immune response to fight it off. In this case, having chickenpox would provide the client with active natural immunity as their body would produce antibodies to fight the virus. Acquiring tetanus and receiving tetanus toxoid, receiving the rabies vaccine after being bitten by a dog, and injection of gamma globulin all provide passive immunity, as they are artificially introduced to the body and do not involve the body's own immune response.