Final answer:
The activation of the fusiform face area (FFA) is involved in recognizing and learning new faces, as well as remembering familiar faces even when they are not directly in the visual field.
Step-by-step explanation:
The activation of the fusiform face area (FFA) is involved in recognizing and learning new faces. This brain region, located in the anterior fusiform gyrus of the temporal lobe, is responsible for facial recognition. It is also associated with memory processes, allowing individuals to remember familiar faces even when they are not directly in their visual field. Therefore, the correct option is C: learning a new person's face, recognizing it later, and remembering that she is still in the room when not directly in the visual field.