What law was implemented during the Byzantine empire that is used in our legal system?

When conducting research for forming a hypothesis, which practice should historians follow?

What is intervention ? in government terms

Germany italy and japan formed the tripartite pact in part because they: a. hoped to convince the united states to stay out of world war ii b. share the ruling philosophies based on communist economics c. resented the agreements they were forced to sign at the munich conference d. believed their territories were threatened by aggressive foreign states