Ancient China, or Ancient Egypt
The correct answer would be option C, Exchange Rate.
When planning a trip to Spain, Brett and his wife, both Americans, were concerned about how much they could afford to spend in Europe because sometimes the U.S. dollar will buy more goods and sometimes it will buy less, based on changing economic conditions. The Exchange rate is the rate at which the currency of one area or country can be exchanged for the currency of another’s.
Explanation:
When one currency of a country is exchanged with the currency of another country, the rate at which the currencies are exchanged is called as the exchange rate.
For example while planning a trip to Europe from America, the couple have US dollars which they need to exchange in Euros to be able to use the currency in Europe.
Roughly, a Euro is equivalent to 1.08 US Dollars, as of today. So this 1.08 dollars will be the exchange rate for US dollars to Euro.
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The closest source of marble for Rome was in the Apuan Alps 350 km north of Rome. In fact it was the Romans who started exploiting marble there.
The federal principle of government.
And federal means pertaining to or of the nature of a union of states under a central government distinct from the individual government of the separate states
Answer: Research question
Explanation:
Research question is defined as the question to inquire about any particular incident or situation.This question is answered by candidates to start any qualitative and quantitative research or study. This question initially helps in gathering content, data,facts, etc to investigate and analyzing further on the issue.
According to the question, Dr. Jenka has raised a research question by inquiring about the impact of war in Afghanistan and Iraq on children's elevated fear and concern.This will help him to start the research on that subject.
