The quotation from “Mary Queen of Scots…” that best expresses a similar idea to the influence of grandparents on a young mind toward reason and compassion is:
B. The study of letterlocking supplies us with rich information about the concern historical figures had with communication security. (Paragraph 13)
This option reflects the idea that understanding and learning from past actions, such as the security of communication, can influence and inform current and future behavior, analogous to how grandparents can influence young minds.