Athorough testing of the possible explanations for a problem is called an evaluation study.

Ok so i would give u ideas like peaceful protest like saying calmly no i will not get up from this restaurant until i get some food. and if the police come say all i want is food. u cant arrest me for trying to get some food

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.