What are some disadvangences in using a secondary source the using a primary source?

What does the document of the birtish octopus is an uderlying cause of the world war 1

Alot of points! ! what was the greatest achievement of el libertador, simón bolívar? a. he became a military strongman in peru. b. he freed venezuelans from spanish rule. c. he bernardo o'higgins liberate chile. d. he united mexicans of all races against spain.

What was one effect of the rise of factories during the industrial revolution