The key to maintaining a strong friendship is trust and communication. Youre friends with someone because you two have something in common or simply get along. Trusting and being able to be trusted leaves less room for problems. If problems arise talking it out usually clears up misunderstandings.
It's answers A. and C. Hope this helps :)
<span>If the options are these then the answer is D.
A) Brooks, Sam. "Chimps and Champs." 14 Jan. 2010. Print. B) Oscar, and Amanda L. Thompson. New York: American Books, 2007. Print. C) Evans, Clyburn, Norma. "Saving our Rain Forests from Destruction." 10 Dec. 2009. Online. D) Lantz, Max R. The Habitat of the Chimpanzee. New York: Publishing USA, 2005. Print.
Hope I helped,
Ms. Weasley</span>