【单选题】The reason that the claim that floating exchange rates result in greater economic autonomy for individual countries may not be entirely accurate is that:
A.
empirical research finds no supporting data.
B.
policy makers are influenced by the effect of domestic policies on the exchange rate.
C.
there is no generally satisfactory method for measuring economic autonomy.
D.
it is based on the assumption of a gold standard.
E.
countries that run large trade deficits must increase exports to balance trade.
【判断题】Individual countries have developed their own regulatory systems regarding GMOs, with the most marked differences occurring between the USA and Europe.
【单选题】选择一个选项将该句补充完整:Due to differences in customs clearing times between the individual countries, _____cannot be guaranteed on all international shipments. ( )