How have the countries of oceania been able to increase their trade?
a.
improved communications

c.
improved technology

b.
improved transportation

d.
all of the above

IT IS 110% D. All of the above

Explanation:

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It is useful for historians to write narratives so that history can be passed on from their point of view.  think about a story being told in third person, then think about it again being told in first person, by someone who actually experienced the event.