Answer:
a. other countries have a comparative advantage over Vietnam and Vietnam will import textiles.
Step-by-step explanation:
A country has comparative advantage if it produces a good or service at a lower opportunity cost when compared to other countries.
The price of textile in Vietnam is higher when compared with other countries, this shows that Vietnam doesn't have a comparative advantage in the production of textile.
Vietnam should import textiles and use its resources to produce other goods for which it has a comparative advantage.
I hope my answer helps you.