How did the Romans choose their new emperors?

The first answer is simple: hereditary rule. For most of this period, emperors were not chosen on the basis of their ability or honesty, but simply because they were born in the right family. For every great leader, such as Augustus, there was a tyrant like Caligula.

Hope this helps!

answer: you could try asking a family member maybe?

the answer is a) high entry costs