The type of health insurance policy most likely used to cover all students attending a large university is

A franchise policy is generally used for businesses or groups that want to provide insurance coverage to individual members, but each member needs to apply separately. This approach lacks the cohesive coverage provided by a blanket policy, making it less practical for a large university setting where uniform coverage for all students is necessary.

A student fund may refer to a financial pool created by students to support health expenses, but it does not function as an insurance policy. This option does not provide the structured, regulated health coverage that a blanket policy offers, which is essential for ensuring students have access to necessary medical services.

A self-insured plan involves the university taking on the financial risk of providing health benefits to students without purchasing an insurance policy. This method is often complex and may not guarantee coverage for all students, making it less favorable compared to the simplicity and inclusivity of a blanket policy.