Respuesta :
The secondary sources that are appropriate to use for research are I. scholarly sources. There are a couple of reasons why II and III cannot be correct, but the most important one is that they are primary, not secondary sources. III is especially incorrect because magazines are rarely used as a source of academic research.
The correct answer is:
1. Scholarly sources and 2. Substantive news.
Both Scholarly sources and Substantive news are appropriate secondary sources to use for research. A secondary source is a document that was created by someone who did not directly participate in the events portrayed. In historical research, for example, secondary sources are generally scholarly books and articles, and reference sources like encyclopedias.