-After a Long and Cold Winter, Jim Was Excited to Start

-After a long and cold winter, Jim was excited to start exploring the woods behind his new home. His first adventure included exposure to poison ivy without any reaction. A month later, though, a second walk through the woods was not so great, since two days later Jim had a terrible rash that lasted for weeks. The fact that the rash took two days to develop indicates that this immune response was an example of

A) humoral immunity.
B) cell-mediated immunity.
C) innate immunity.
D) the activation of Toll-like receptors.
E) the activation of the complement system.