What jurisdictional issue arose from the husband's and wife's separation after 10 years of marriage?

In cases involving marriage and separation, jurisdiction typically falls under state courts, as family law is primarily governed by state statutes. This exclusive jurisdiction of state courts over marriage and divorce matters stems from the principle that states have the authority to regulate domestic relations, including marriage, divorce, custody, and support.

In this scenario of a husband's and wife's separation after 10 years of marriage, the jurisdictional issues primarily revolve around defining the legal status of the marriage and the process for obtaining a divorce. Since these issues are managed by state laws, state courts have the exclusive jurisdiction to adjudicate divorce cases, rather than federal courts, which usually only become involved when there is a specific federal question or diversity of citizenship issue — neither of which is inherently present in a straightforward separation or divorce situation.

The other options do not accurately reflect the jurisdictional landscape for a divorce or separation. For example, while some interstate issues may arise (possibly leading to federal jurisdiction in a broader context), they do not apply solely to the typical state court processes regarding divorce. Therefore, state courts holding exclusive jurisdiction is the foundational principle guiding the legal context of marital separation.