The fact that there are few reciprocal agreements among countries on the licensing of professionals most likely means that ________.
A) universities' study abroad programs do not enable students to obtain dual degrees and licenses from more than one country
B) more service functions are being handled as not-for-profit
C) people immigrate to those countries with the highest standards so as to more easily become licensed anywhere else
D) there is an effective limitation on trade in services
Answer: D) there is an effective limitation on trade in services
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