What is a key factor that allows NGOs to function in China?

A key factor that allows NGOs, or non-governmental organizations, to function in China is their requirement to register with government authorities. This process is essential because it helps the government regulate and monitor the activities of these organizations. By registering, NGOs gain a level of legitimacy and can operate within the framework of Chinese law. This registration process often involves the need for an organization to have a Chinese governmental entity sponsoring it, which further connects these NGOs to the state's oversight.

While NGOs might engage in various activities, their ability to operate successfully relies heavily on this structured relationship with the government. The other options present alternatives that either surpass the boundaries set by the government or do not accurately reflect the operational realities of NGOs in China. The necessity of registration underscores the delicate balance that NGOs must maintain between pursuing their missions and complying with the regulatory environment imposed by the state.