The answer would be D.
As for The other options, it cannot be A because there is no way we could know if they are exactly similar. B states they are dramatically different when there is obviously some similarity. C states that they are from the same time period, which is impossible as there is no way a layer of sedimentary rock can be the same age as current day mud. There are likely many layers above the studied area that can denote the age.
External migration means immigrate to a country from another country
The correct answer is B.most of the land is used for housing, transportation, commercial interests, and manufacturing.
Crop harvesting and production is usually kept on farms outside of urban areas because of the vast land necessary for production. About 54% people live in urban areas which is lower than 3/4 mentioned in answer 1.
Answer: B
Explanation: When you are assimilating to another culture that doesn't mean you have to abandon old traditions and languages.
