Answer the following question: Read the article and select the best answer. Article: More than 40 countries, including Russia and Taiwan, have agreed to be founding members of China's proposed Asian Infrastructure Investment Bank. However, two of the world's largest economies, the United States and Japan, have _ at this time. China proposed the bank last October as a way to finance roads, bridges, ports and other needed infrastructureprojects in Asia. The time limit for joining as a founding member was March 31. In only a few months, the number of countries seeking membership nearly doubled. They came from Africa, Europe, South America, Asia and the Pacific. Some European powers added themselves to the list. They include Britain, Germany, France and Italy. Other important economies include South Korea, Australia and Russia. Taiwan also sought to become a founding member. But it is not clear how China will react. Taiwan and China do not have diplomatic ties. But, relations have improved since the election of President Ma Ying-jeou in 2008. The two sides also are working on details of a trade agreement. However, popular opposition in Taiwan to mainland China's increased influenceon the island remains very strong. The U.S. and Japan have said they are concerned about the governance of the Asian Infrastructure Investment Bank, or AIIB. The United States has urged countries to consider details about the bank's governance and standards -- itssocialand environmental policy -- before joining. Critics say the AIIB threatens the work of existing development banks such as the World Bank, the International Monetary Fund and the Asian Development Bank. Yet, the Asian Development Bank itself noted in a recent report that the need for infrastructure projects in Asia is great. The institution, led by the U.S. and Japan, estimated last May that the Asia Pacific area needed $800 billion each year in infrastructure development. Experts are watching to see how China will take its leadership role in the new bank. The AIIB is expected to start with $100 billion in capital, mostly from China. Some experts point to... Question: In what aspects do The United States and Japan show worry for AIIB? Options: A: Regulation and running B: Raising money and investment C: The number of joining countries D: China's influence in it
Answer:
A