Final answer:
Chapter 15 of 'The Giver' is best summarized by Jonas finding the Giver in pain and receiving the traumatic memory of war, highlighting the burden of knowledge.
Step-by-step explanation:
The best summary of Chapter 15 in The Giver is option A: Jonas finds the Giver in pain and offers help. The Giver then gives Jonas a terrible memory of a wartime battle. In this chapter, we witness one of the pivotal moments where Jonas experiences the deeply painful and traumatic memories that the Giver holds, understanding why the community has chosen to shield its citizens from such emotions and history.