Which of the Following Best Explains Why Hominins Such as Homo

Which of the following best explains why hominins such as Homo erectus and Homo ergaster likely worked together in groups?

A) They were less capable than earlier hominins of hunting and gathering food, and as a result formed groups to enhance their food collecting abilities.
B) They likely gave birth to immature offspring, which required some type of division of labor to allow for mothers to care for their young.
C) They likely experienced emotions and familial bonds similar to those of modern-day humans and formed societies based on these attachments.
D) They likely modeled their behavior on that of their non-bipedal counterparts, who routinely formed complex groups to ensure their survival.