The language spoken most often in Azerbaijan and Farsi (the language spoken in Iran) are considered to the origin of Indo-European languages. However, the Indo-European languages are considered to be a family of several hundred languages and dialects which are all related. There are said to be around 445 Indo-European languages with 313 of them part of the Indo-Iranian branch alone.
I believe it is D.
Because barter system. Like it kinda explains its self.
Duties: something that someone is expected or required to do by moral or legal obligation.
tariffs: a tax charged on goods as they pass between one country and another.
My guess would be B. hope this helped!
