The long-run aggregate supply curve shifts right if a. either immigration from abroad increases or technology improves. b. immigration from abroad increases, but not if technology improves. c. technology improves, but not if immigration from abroad increases. d. none of the above are correct.

a. either immigration from abroad increases or technology improves.

Explanation:

A long-run aggregate supply curve is a concept in economy that mentions to the output that an economy can produce when utilizing all its parts or elements  of production.

When a long-run aggregate supply curve shifts right means that the production increases and economy rises. And that is true only when technology increases or immigration increases.

Thus the answer is --

a. either immigration from abroad increases or technology improves.

answer; i believe that the correct answer is rapid and subsequently slow down;

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