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.
The same number multiplied by 1 because the product of any number multiplied by 0 is 0. if it is multiplied by 1 it will be greater than 0 (unless the number is 0)
