What is one advantage of using secondary sources when doing research?
o
a. they you get the main ideas faster.
b. they contain more technical details.
o
c. they are written by the scientists who did the experiment.
d. they can be used as a guide for repeating an experiment.

I think the answer is B

Explanation:

because secondary sources contain extra information that help the reader learn more about the research...

also a primary source would be a speech, artwork, autobiography, newspaper, etc

these sources don't contain extra info

answer; how far out of place which the object finished relative to the starting location;