Which of the following correctly describes the trend in the evolution of the hominid jaw that took place over millions of years, from early ancestors to modern humans?

The jaw became less rectangular and more arched. It also grew smaller and projected less.
The jaw became generally larger as hominid forms increased in height.
With time, the jaw became less oval-shaped and more rectangular.
With fewer teeth, the hominid jaw became smaller over time. It changed little in its shape.