What does a historian think about when analyzing a primary source?

each historian including you will approach a source with a different set of experiences and skills and will therefore interpret the document differently in order to analyze a primary source you need information about two things the document itself and the area from which it comes

Historians follow a method of research that depends on the historical facts and records left by their predecessors. By virtue of this, they seek solid evidence and reliable sources, sometimes interacting with Archaeologists to explain the manner and reason for what happened in the past, which they document in a chronological narrative and explain its causes and influence in the formation of modern times.

Explanation:

"Since taking control, Britain had many laws that imposed harsh taxes and stopped Indian trade with other countries."