Naturalist: Different nonhuman primate species exhibit many contrasts in behavior. If a zookeeper leaves a screwdriver within reach of a chimpanzee, the animal is likely to examine and play with it for a time, and then move on to something else. In the same circumstances, an orangutan is likely to pretend to ignore the tool at first; later, in the zookeeper ' s absence, the orangutan may use the screwdriver to try to dismantle its cage. Which one of the following is most strongly supported by the naturalist's statements? ['Orangutans are the most intelligent of nonhuman primates.', 'Orangutans dislike being caged more than chimpanzees do.', 'Some nonhuman primates are capable of deception.', 'Not all nonhuman primates understand tool use.']