It's true because the author tries to teach the reader something
C. A manuscript. If only one answer is allowed. A primary source is a document that is created at the time in which the events it describes is occurring. A manuscript is something that is written by hand and therefore the author would be describing events or ideas that occurring at the time of creating the manuscript. A textbook references other ideas and is a secondary source. A fiction book describes unreal events. A journal article is published in a collection and often refers to other previous events.
This is very. Interesting-
Blue, and
pasture,
the native grasses,
Disappointed,
I may be wrong but it sounds right and looks right.