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Discussion

Method of data collection changes primarily with :

  • A.Subject of investigation
  • B.Scope of enquiry
  • C.Statistical technique
  • D.Study area

Answer: B

The key gives scope of enquiry.

The reading that fits is that the method of collecting data follows how wide the enquiry is. A wide-area study points to census or sample surveys and secondary sources, while a narrow, site-specific study can rely on focused fieldwork. Research methods texts treat the nature and scope of the enquiry as the main factor in choosing a collection method.

What could not be confirmed: no source found states the sentence in these exact terms, so the key is kept as a well-supported principle and not a formal rule. The subject of investigation (A) also influences the method, so A is a rival reading that the key does not take. A statistical technique (C) is chosen after the data are collected, and the study area (D) is part of the scope rather than a separate determinant.

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