Jeff is playing with his rattle when his mother takes it away. Instead of searching for it, he immediately begins to look at the fan. Which of the following best explains why?
a. Jeff has infantile amnesia
b. Jeff lacks conservation
C. Jeff has not yet attained object permanence
d. Jeff lacks reversibility

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.