Final answer:
In Illinois, the legal individual to hold an open house on behalf of Agent Andrew would be the owner of the property. Another licensed real estate agent could also do so, but an unlicensed assistant or a hired security guard would not be permitted.
Step-by-step explanation:
In Illinois, if an agent like Agent Andrew is unable to hold an open house due to a personal emergency, such as a death in the family, the open house can legally be held by: c) The owner of the property. Although the legal requirements can vary by state, generally, the owner of the property has the right to show their home. Licensed individuals may also hold an open house, which could include another agent from the same or different company. However, an unlicensed assistant or a hired security guard would not be authorized to hold an open house as they do not hold the required real estate licenses.