Which of the following best defines a Campus Card?

The definition of a Campus Card is best captured by the idea that it serves as a multipurpose card used by students for various activities. This encompasses a broad range of functions that go beyond simple identification. A Campus Card typically serves as an ID, but it also often provides access to facilities such as libraries, dining services, and even payment systems within campus stores.

Additionally, many institutions utilize Campus Cards to facilitate various campus services and activities, such as participating in events, accessing dormitories, or checking out equipment. This versatility is crucial for enhancing the student experience, as it simplifies the process of managing different aspects of campus life into one convenient card, making option C the most accurate definition.

In contrast, options that suggest a more limited use, such as solely being an ID card or a payment card, fail to encompass the functionality and importance of Campus Cards in the overall campus environment. Thus, the comprehensive nature of option C aligns with the multifaceted role that Campus Cards play in students' daily lives on campus.