What does it mean for claims to share a "common nucleus of operative fact"?

When claims share a "common nucleus of operative fact," it means that they arise from the same basic facts or events. This concept is crucial in understanding the principles of joinder and supplemental jurisdiction. When multiple claims are interconnected in this way, it often allows them to be addressed in a single legal proceeding, promoting judicial efficiency and avoiding inconsistent judgments.

This shared factual background means that the claims are not isolated from one another; instead, they relate to the same circumstances surrounding an incident or transaction. As a result, it is more just to try the claims together because the facts relevant to the claims are intertwined, which can also lead to a clearer understanding of the overall situation by the court.

The other options do not accurately capture the essence of what this phrase denotes. Claims based on different factual scenarios do not share a common nucleus, and requiring claims to have the same legal remedy or belong to different jurisdictions does not pertain to this concept. Thus, option B correctly identifies the key factor driving the concept of a common nucleus of operative fact.