Final answer:
The queen likely performs the ceremonial act of pouring mead or libation for the guests during her arrival in the hall, which aligns with historical practices depicted on artifacts such as the Warrior Vase.
Step-by-step explanation:
The ceremonial act performed by the queen when she arrives in the hall, based on the given historical context, is not explicitly stated among the options provided (a eulogy, distributing gifts, blessing weapons, or pouring mead). However, examining the historical texts provided for reference, there is an instance describing a ceremonial act involving libation, which can be linked to the act of pouring mead for the guests. In such ceremonies depicted on the Warrior Vase, women perform libation, pouring liquid from one vessel to another, which is akin to the act of serving a drink to honor the attendees or the deities they worshipped.
From the other historical descriptions, one can infer the importance of various ceremonial acts aimed at displaying wealth, power, and the reinforcement of social and political ties—be it in a funeral procession, religious sacrifices, or royal gift-giving ceremonies. However, none of these contextual examples precisely describe the queen herself partaking in a ritual that neatly matches any of the four options presented. Therefore, while we can ascertain that libation was a significant ceremonial act, we may conclude that, in the context of a royal ceremony, the closest act resembling the options provided would be the queen pouring mead or some form of libation for the guests as part of the ceremonial proceedings.