Final answer:
Deer would most likely seek refuge in trees when chased by hunters to the perimeter of the mere.
Step-by-step explanation:
In response to being chased by hunters to the perimeter of the mere, deer would most likely seek refuge in the trees (option d). Seeking refuge in trees is a common defensive strategy for many animals, including deer, when they feel threatened or pursued by predators. By climbing trees, deer can increase their chances of evading hunters and staying safe.