Answer:
Atomic weapons
Explanation:
Atomic weapons were not invented yet until much later
Answer;
The open door policy
Explanation;
Us secretary of state John Hay established the Open door policy which opened China's ports to European trade.
Open Door policy was a statement of principles initiated by the United States in 1899 and 1900 for the protection of equal privileges among countries trading with China and support of Chinese territorial and administrative integrity. John Hay, the secretary of state proposed this policy under president McKinley towards China for all countries.
D. To increase their influence in the world
The primary difference between paper value and real value is that paper has no "real" value in that the currency is based entirely on faith--whereas real value (as it exists in something like Gold) is intrinsically useful. <span />
