The J curve shows that:

A.devaluation is more likely to improve the trade balance in the short-run than in the long-run.

B.devaluation is more likely to improve the trade balance after a longer span of time has elapsed.

C.devaluation is likely to be unstable.

D.devaluation is unlikely to improve the trade balance in either the short-run or the long-run.

正确答案：devaluation is more likely to improve the trade balance after a longer span of time has elapsed.