Historical interpretation that the source support is Chinese workers were well treated. Thus the option (D) is correct.
What is the meaning of Historical ?
The things or the events are related to the past is known as historical. Various historical interpretations are also made.
Historical interpretation is the process by which the assumptions and conclusions are created about the past events. One such interpretations is given in the above source that Chinese workers were well treated as they were hard working.
Thus the option (D) is correct.
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