Comparative advantage is a guiding principle in how countries should trade with each other.
Comparative advantage is an economic theory with the idea that countries should produce goods that they incur less opportunity cost in.
It also means that countries should buy goods that they have a higher opportunity cost producing.
Now, the U.S. has a higher opportunity cost than India when it comes to customer service operations and as a result, by the principles of comparative advantage, India should engage in customer service instead of the U.S.
In conclusion, Indians incur less opportunity cost in customer service and so the U.S. exports it there.
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