Elephants appear to have the capacity to remember large-scale spaces over long periods. What best identifies this capacity?
a. Their large hippocampus, which is responsible for spatial memory
b. Their strong sense of smell, which helps them remember distinct scents in different locations
c. Their ability to communicate with other elephants to share and reinforce memories of large-scale spaces
d. Their keen visual memory, which allows them to remember specific landmarks and topographical features
