Under a business auto policy, which of the following is true regarding the coverage for temporary vehicles?

The coverage for temporary vehicles under a business auto policy indeed includes protection for vehicles that are rented by the insured. This means that if a business needs to use a temporary vehicle, whether from a rental service or another source, the policy can extend coverage to these rented vehicles, assuming the circumstances comply with the policy's terms. This aspect is crucial as businesses often need the flexibility to use vehicles without leaving themselves uninsured when they rent a vehicle to maintain operations.

The other choices do not align with the terms typically found in such policies. For instance, coverage usually does not stipulate that the vehicle must be owned by the insured, nor does it impose a stricter timeframe like a 30-day limit on rental coverage. Additionally, complete exclusion from policies without exceptions is not accurate, as most business auto policies explicitly aim to provide coverage under certain defined conditions for vehicles that are not owned by the business, including rented ones. Therefore, the correct understanding revolves around the inclusion of coverage for rented vehicles, which is a significant benefit for businesses needing to manage temporary transportation needs.