The correct answers are A) They executed their rivals by cutting off their heads and D) They threatened their rivals with war.
The statements that describe a method kings and queens of northern Europe used to gain power were "They executed their rivals by cutting off their heads and they threatened their rivals with war."
Northern European monarchies were so interested in not only maintain their wealthiness but on increasing it. They always had imperialistic intentions and aimed to invade and conquer territories to increase their power and dominion. Kings and queens did not hesitate to wage war with other nations and kill and destroy towns in order to capture the land. Once they conquered new lands they jailed its former rulers or cut their heads to show their power and send a message to other rulers.
The melting-together metaphor was in use by the 1780s. The exact term "melting pot" came into general usage in the United States after it was used as a metaphor describing a fusion of nationalities, cultures and ethnicities in the 1908 play of the same name.
