Which of the following is a secondary source?

Encyclopedia article about William Penn

Declaration of Independence

Letter about Plymouth written by one of the founders

Map of Jamestown drawn by John Smith
im stuck on this one. i will give medal.

Question

Which of the following is a secondary source?

Encyclopedia article about William Penn

Declaration of Independence

Letter about Plymouth written by one of the founders

Map of Jamestown drawn by John Smith 
im stuck on this one. i will give medal.

anonymous · Answer

A secondary source is a document or recording that relates or discusses information originally presented elsewhere.

anonymous · Answer

i picked B im not sure because theres also that letter of plymoth'

anonymous · Answer

I would say its C. But im not positive.

anonymous · Answer

The answer is definitely the encyclopedia article written about William Penn. 
This is because a secondary source is written by someone who didn't witness the event that occurred. A primary source is written by someone who was there. If you notice, all of the choices are written by someone(or drawn)m by someone who was present at the time. The declaration of independence is a primary source, an article about the declaration of independence would be a secondary source. I am a hundred percent positive that the answer is A.