The main point of a passage is the "what" of the passage. What is the author talking about? We know from the first paragraph that textiles are really important to investigating the crafts practiced by women in ancient times. However, researchers are thwarted by the "perishable nature of cloth" (lines 3-8). We are then given info that "technological advances in the analysis of archaeological remains provide much more information than was previously available, especially about minute remains" (lines 19-22). The second paragraph goes more in depth about different technologies and how they are helpful. The third paragraph further discusses what the advancements in studying ancient textiles has taught us. Thus, the main point of the passage is answer choice (B), i.e. "A diversity of new approaches to the study of ancient textiles has enabled researchers to infer much about the history of textiles and their creators in the ancient world from the scant evidence that remains."
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