"<span>B. The three state capitals that I have visited are Austin, Texas, Montgomery, Alabama, and Bismarck, North Dakota" is technically correct but there's really no need to list the states here. </span>
Answer: B. subsistence farming
Subsistence farming is a type of farming in which the harvests are used only to feed the family and support the needs of the family. In this type of farming, there is little to no harvest left for trade.
Answer: Marie Curie studied the radiation of all compounds containing the known radioactive elements, including uranium and thorium, which she later discovered was also radioactive. She also found out that:
- you can exactly measure the strength of the radiation from uranium;
- the intensity of the radiation is proportional to the amount of uranium or thorium in the compound - no matter what compound it is;
- the ability to emit radiation does not depend on the arrangement of the atoms in a molecule; it must be linked to the interior of the atom itself - a revolutionary discovery!
When she realized that some uranium and/or thorium compounds had stronger radiation than uranium, she made the following hypothesis: there must be an unknown element in the compound which had a stronger radiation than uranium or thorium. Her work aroused the interest of her husband, Pierre Curie, who stopped his own research on crystals and joined the "detective work" with his wife. And Marie was proven right
The original cause of the split was a difference in opinion on who should lead after Muhammad died.
The correct answer to this open question is the following.
Although there are no options attached we can say the following.
The availability of trade goods, new ways of doing business, the expansion of trade and business would lead to the death of Feudalism in Western Europe in the Middle Ages because these activities gave people such as merchants the opportunity to expand their vision and effort to create a better form generating income to support their families and make a better living.
Under the feudal system, poor people such as peasants and merchants lived in stringent and difficult conditions. But with trade and the expansion of business, they found a better way.
For instance, that is why regions in Italy could grow and flourish. Medieval communes in Italy started to develop into city-states in the 11th century. The first ones to be developed were Venice, Florence, Pisa, and Genova.
