This question tests the understanding of the particularist theory in anthropology and its rejection by some anthropologists in the early 1900s. The particularist theory emphasizes the uniqueness of each culture and the importance of understanding cultural practices within their specific contexts. Option A aligns with the particularist theory itself, not its rejection. Option B correctly reflects the stance of those who rejected the particularist theory, as they believed in universal laws that could explain cultural similarities. Option C actually describes the particularist theory, not its rejection. Option D introduces an unrelated emphasis on biological factors, which is not relevant to the rejection of the particularist theory. Therefore, the correct answer is B, as it accurately represents the perspective of those who rejected the particularist theory.