Why did the spartans emphasis military training

The Spartans emphasized military training because in general, they were a nation of soldiers. They were built and raised as warriors because the Spartans prided themselves as heroes that were extremely strong and extremely fierce in battle. Because of their strong military background, they developed a military culture that was brought down to each of the descendants of Sparta. Even since birth, Spartans already learned the ways of the warrior. 

The answer is d. depriving colonists of trial by jury.