<span><span>Primary sources are original materials on which other research is based, including:<span>original written works – poems, diaries, court records, interviews, surveys, and original research/fieldwork, andresearch published in scholarly/academic journals.
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Secondary sources </span>are those that describe or analyze primary sources, including:<span>reference materials – dictionaries, encyclopedias, textbooks, andbooks and articles that interpret, review, or sythesize original research/fieldwork.
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Tertiary sources are those used to organize and locate secondary and primary sources.<span>Indexes – provide citations that fully identify a work with information such as author, titles of a book, artile, and/or journal, publisher and publication date, volume and issue number and page numbers.Abstracts – summarize the primary or secondary sources,<span>Databases – are online indexes that usually include abstracts for each primary or secondary resource, and may also include a digital copy of the resource.
Hope this helps! :D</span></span></span></span>
It’s the second one I believe
As per RACE Chart,
<u>R -</u> The ancient rulers of Russia choose to use Christianity for the establishment and maintenance of the nation and its government.
<u>A -</u> Okay
<u>C -</u> As per history, Prince Vldamir sent his emissaries to various countries to learn about their religions because felt that Russia would become a unified nation if it has its people practicing one single religion. The prince chose the Byzantine faith of Orthodox Christianity as the faith to bring his country of turmoil into harmony.
<u>E -</u> This Christianity was introduced into the East Slavic state of Kievan Rus by the Greek missionaries from Byzantium in the 9th century. Also, when Russia layed under the Mongol rule from the 13th through the 15th century, the Russian church enjoyed a central position by obtaining the immunity from taxing heavily.
<span>Because he fought for a popular cause.
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