A
Consumption of services abroad by tourists and students
B
Cross-border movement of professionals and natural persons
C
Cross-border supply of services through telecommunication networks
D
Commercial presence of foreign banks and retail chains
Correct answer: (b) Cross-border movement of professionals and natural persons
Explanation
Option B is correct because GATS Mode 4 covers the movement of natural persons across borders to supply services. Options A, B, and C refer to different modes of service supply under the General Agreement on Trade in Services (GATS).
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