What must a summons include, according to the relevant rules?

The correct choice highlights the requirement that a summons must include the name and address of the plaintiff's attorney. This is essential for several reasons. First, it ensures that the defendant has a clear point of contact for legal representation and can easily obtain legal advice regarding the allegations against them. Additionally, including the attorney's information provides transparency in legal proceedings and aids in facilitating communication between the parties involved.

The other options do not align with the standard requirements for a summons. For example, while a signature of the plaintiff may be necessary in certain documents, it is not a universal requirement for a summons. Details of the defendant's assets are not relevant to a summons and would typically be addressed in discovery or other stages of litigation, not in the initial notice of a legal action. Lastly, verification by the opposing party is not typically required on the summons itself; instead, such verification would occur through other legal processes. Therefore, the inclusion of the plaintiff's attorney's contact information is the most relevant and required component of a summons.