Isaac is researching abraham lincoln’s life for a social studies report. he finds an encyclopedia that includes original letters and articles found in historical journals. the type of source he is using is a primary. b first. c secondary. d tertiary.

The correct answer is D) secondary.

The type of source Isaac is using is a secondary source.

Although encyclopedias could be considered tertiary sources by some authors, in this case, the statement is clearly saying that Isaac is using an encyclopedia that has original letters and articles found un a historical journal, which means that is information taken from primary sources. That is why it is considered secondary and no tertiary.

By definition, primary resources are original materials and other materials are based on these. Commonly, They could be diaries, artifacts, letters, or original pictures and audios. Secondary sources, generally, are interpretations of primary sources, such as encyclopedias, dictionaries, biographies, and histories. Tertiary sources are a collection, edition or interpretation of secondary sources.

C. secondary

Goood luck Famy boiii the test is pretty hard.

your answer is "graduates" hope this