Modern explorers of Borneo's forests see orangutans less often than they did in the past. Scientists have examined several possible causes. It could be that the forests do not produce as much food as they used to. The soil may have become less healthy and, therefore, less able to produce food. Habitat destruction has long been identified as the greatest threat to orangutans. However, a new study indicates that hunting may play a greater role than once thought. According to the study, hunting has not only resulted in fewer orangutans; it has also made the surviving animals less social.

Question - The orangutans are _________.

A - withdrawing
B - beckoning
C - hobbling
D - trespassing