Final answer:
The 'three direct links' leading to the establishment of One China encompass transportation, trade, and communications. These elements are vital for connecting regions, fostering economic growth, and facilitating cultural exchange.
Step-by-step explanation:
The accurate representation of the 'three direct links' leading to the establishment of One China is a) transportation, trade, and communications. These three elements are fundamental in connecting and integrating different regions together, fostering economic growth, and facilitating cultural exchange. For example, transportation infrastructure such as roads, railways, and ports enables the movement of goods and people, trade between regions promotes economic cooperation, and efficient communication systems help in maintaining social and political stability.