C. Implied powers
In the U.S., implied powers<span> are powers authorized by the Constitution that, as the word "implied" said, seems implied by powers that are outspokenly stated. It was</span><span> </span>Alexander Hamilton who<span> defended the constitutionality of the </span>First Bank of the United States<span> against protests, giving life to</span><span> what has now the general statement of implied powers.</span>
Official record of the proceedings and debates of the united states congress published by the united states government printing office
To remedy the stability problem, Bohr<span> modified the </span>Rutherford model<span> by requiring that the electrons move in orbits of fixed size and energy. The energy of an electron depends on the size of the orbit and is lower for smaller orbits. Radiation can occur only when the electron jumps from one orbit to another.</span>
This policy was called "containment" - the idea was to contain communism from spreading to new countries without trying to actively challenge the communist system in the countries that already had it.
This policy lead to some proxy wars, in which the US fought the Soviet Union for the free countries.
The answer is D, Kaiser Wilhelm was the last German Emperor (Kaiser) and King of Prussia, ruling the German Empire and the Kingdom of Prussia from 15 June 1888 to 9 November 1918.
