Under what conditions may a landlord enter a rental unit without written notice according to the Residential Tenancies Act?

The correct choice identifies situations in which a landlord can legally enter a rental unit without providing written notice to the tenant. According to the Residential Tenancies Act, one of the circumstances that permits such entry is in the event of an emergency.

In emergency situations, the urgency of the matter supersedes the usual requirement for notice. This might include scenarios such as fires, floods, or other immediate threats to safety and property. In these cases, the landlord is justified in entering the unit promptly to address the emergency, ensuring the well-being of the tenants and the integrity of the property.

This understanding not only informs landlords of their rights but also helps tenants recognize the conditions under which their privacy may be overridden for safety purposes. Regular inspections and showing the unit, however, typically require advance notice to tenant, reflecting the balance between a landlord’s property rights and a tenant's right to privacy.