What can the Hong Kong Special Administrative Region maintain and develop with foreign states and regions?

The Hong Kong Special Administrative Region (HKSAR) has the authority to maintain and develop a variety of agreements with foreign states and regions, as outlined in the Basic Law. This encompasses a broad spectrum, including but not limited to trade agreements, which are specifically highlighted under the HKSAR's economic autonomy.

The term "agreements" provides a comprehensive understanding that covers various types of arrangements that Hong Kong can enter into beyond just trade, such as cultural, educational, or technical agreements. The flexibility in the wording reflects the HKSAR's capacity to engage with the international community on multiple fronts, consistent with its status as a Special Administrative Region under the sovereignty of China while maintaining a certain degree of autonomy.

In contrast, the options regarding diplomatic agreements and military treaties are more restricted. The HKSAR cannot enter into diplomatic relations or military agreements independently, as these areas are typically reserved for the central government. Thus, the correct choice emphasizes the broader scope of "agreements," which includes trade agreements while also allowing for other forms of international engagement that the HKSAR can pursue.