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 sepoy rebellion was the result of many, many influences and stressors on the cultures of india living under british rule. in britain, it's called the sepoy mutiny on the indian mutiny, but in india, it's called the first war of independence.

the main reason is concerned to the british paramountcy , the belief in british   dominance in india political, economic and cultural life had been introduced in india about 1820."

"they were forced to grow crops that benefited the colonizing nations instead of feeding their own people."

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explanation:

"the attempts of the proletariat to rise above this abasement"