Compared with the complexity of social life, the diet of primates may be better able to predict their brain capacity. The study, published in Nature-Ecology and Evolution, is by far the largest of its kind and questions current hypotheses about why humans and some primates have evolved larger brains than most animals. Taking into account the evolutionary kinship and body size of each species, the authors found that primates that eat fruits have more brain tissue than primates that eat plant leaves. Although the authors' analysis does not explain why eating fruit brings a larger brain, they believe that this may be due to cognitive needs (related to memorizing fruit location and manual extraction of flesh) and caloric rewards (intake of calorie-rich fruits). Instead of heat-poor plant leaves) combined drive.
Which of the following matches the meaning of the above passage?
The complexity of social life cannot predict the brain capacity of primates