Explanation:

- Section 10: This section deals with things said or done by a conspirator in reference to their common design. It is about acts and statements made by one conspirator used as evidence against others.

- Section 6: This addresses the principle of res gestae, which covers the immediate circumstances surrounding an event.

- Section 12: This section is about the relevancy of facts showing the existence of any right or custom.

- Section 8: It discusses the relevancy of the actions of parties, such as conduct influenced by or affecting other facts.

The correct answer is Option 2: Section 10. ""