Which document is an example of a primary source? a) a study published by a team of archeologists.
b) newspaper article written years after an event
c) a textbook chapter devoted to a single historical event
d) letter written by someone who experienced an event
please help

It is D

Explanation: A primary source is a source that comes from someone or something that was apart of the event and there at the time it happened.

the correct answer is history and tradition.

alliances in ww1 were different from ww2 because the entente in ww1 made up of serbia,russia,france,britan,japan and italy later america  and all allied in a sort of balance of power and too keep germany,austria-hungary,and the ottomans down. russia allied the serbians in order to exert its influence in the balkans while france allied the russians because france was still in dismay and insulted after the defeat to the germans during the unification of germany and britian allied the belgians after the germans invasion of belgium.in ww2 the alliances were in a preemptive attempt to deter any further wars into happening while germany and italy allied since they were insulted and humiliated after the previous war while also sharing a similar ideology of facsim along with japan which all 3 had a want for world domination and agreed to assist one another in the endevours 

explanation: