Assist on how to answer the question below.

Consider the case of two countries, Afghanistan and the US, both producing carpets and fighter aircraft. The attached table below shows output rates per day in the two countries if all resources are fully and efficiently employed. Use this information to answer the question.

If Afghanistan raised its aircraft productivity to 5 units per day, then.

Choose the correct answer below

A Mutually beneficial trade would no longer be possible.

B Afghanistan would continue to import fighter aircraft from the US.

C Afghanistan should switch from the export of carpets to the export of aircraft.

D The US would retain its comparative advantage in carpet manufacture.

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