Answer:
This made double-cropping possible in some areas, and in some places, even triple-cropping became possible ... the hardiness and productivity of various varieties of rice were and are in large part responsible for the density of population in South, Southeast, and East Asia.
Tools probably as they show more of the history. They're primary resources.
Architecture may show more religion and political institutions though.
The correct answer is True.
Explanation: Theoretical sampling is a term coined by Barney Glaser and Anselm Strauss in 1967 in the context of social research to describe the process of choosing new research fields or new research cases to compare with others that have already been studied. This is one of the tools of qualitative research.
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