What classification system is used in Paralympic sports?

The IPC Athletes Classification System is the correct answer because it is specifically designed for the classification of athletes with disabilities in accordance with the principles set by the International Paralympic Committee (IPC). This system categorizes athletes based on their functional abilities and disabilities, ensuring a fair competition among participants.

The IPC Athletes Classification System considers various factors, such as the type and extent of an athlete's impairment, and it establishes categories that allow athletes to compete against others with similar levels of impairment. This is crucial for the integrity of the competition and helps to create equitable opportunities for all athletes participating in Paralympic events.

Other options do not accurately reflect the classification standard used in Paralympic sports. For example, the International Classification System is more general and does not specifically pertain to sports, while the Global Sports Classification and Unified Sports Classification System serve different purposes or focuses that do not align with the specialized needs of the Paralympic athlete classification framework.