I havent read this book in a while but im pretty sure its "C"
To give the stuff directly in
Oral summaries provides more information of the main idea
A. 1 b.2 c.4 d.3
that's the answer in my opinion
Answer:
A. Details that reinforce the main idea
Explanation:
This is because supporting details are an explanation for the main idea. Therefore the main idea is backed up (reinforced) with details that support it.