Which of the following was the most likely cause of the trend shown on the graph? A. the increase in the number of immigrants to the United States B. the growth of industrialization and the development of factories C. the expansion of plantations and the spread of slavery D. the escalation of nativism in the Northeast

Currently, as of february 2016, an american traveling in france would be by the exchange rate. the weakness of the euro and the strength of the us dollar means that items in france cost less to an american than they otherwise would. of course, if this trend reverses and the us dollar weakens and the euro strengthens, such as was happening in early 2008, an american traveling in france would have an adverse experience because items would cost relatively more.