Which of the following can impact a tenant's ability to sublet their apartment?

The tenant's ability to sublet their apartment is significantly influenced by the landlord's consent. In many lease agreements, landlords retain the right to approve or deny any subletting requests. This means that even if the tenant finds someone to take over their lease obligations, they must seek the landlord's permission first. The landlord may have specific policies in place regarding subletting, including certain criteria that potential subtenants must meet. Therefore, obtaining consent from the landlord is crucial in the subletting process, making it the most impactful factor in this scenario.

Other factors, while they may contribute to the overall landscape of renting and subletting, do not directly dictate a tenant's ability to sublet. For example, the popularity of the neighborhood could influence a tenant's desire to sublet or the attractiveness of the location to potential subtenants but does not provide any legal or contractual barriers to the act of subletting itself. The duration of the lease may affect how long a tenant can sublet, but it does not determine whether subletting is permitted. Similarly, the age of the tenants is not a relevant factor in most subletting agreements. Thus, consent from the landlord is the primary determinant in this context.