题目:The following are the obligations of tourism government, especially in time of crisis, EXCEPT_________.
A. inform their nationals of the difficult circumstances, or even the dangers they may encounter during their travels abroad
B. issue information of difficult circumstances, or dangers in an exaggerated manner to the tourism industry of the host countries
C. formulate recommendations that are strictly proportionate to the gravity of the difficult situations encountered and are confined to the geographical areas where the insecurity has arisen
D. qualify or cancel such advisories as soon as a return to normality permits
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