Zach gets angry because Austin earned a better grade on a test than he did. They get into an argument, and Zach takes a swing at Austin, intending to hit him. Austin shoves Zach in order to avoid the blow. Which of the following is true regarding Austin's action?

Austin did not commit an assault or a battery because he acted in self$-$defense.

Austin cannot rely upon self$-$defense because his life was not in danger.

Austin cannot rely on self$-$defense because he was involved in the argument and not completely innocent.

Austin committed a battery.

Austin committed both an assault and a battery.