What marked the official transition from roman republic to roman empire?

I’m annoyed but glad that my history teacher left and quit her job as a teacher to become a flight attendant

What are the two powers that the federal and state governments share?

According to the sixth amendment, what can the woman do to support her court case? 1/ she can hire a different lawyer. 2/she can request that the trial be moved to a different state. 3/ she can require the witnesses to testify. 4/ she can refuse to testify.