Concept:The underlined word is
buoyant, which means thriving or successful.
We need its opposite that fits the gap in the sentence about the economy.
Explanation:A buoyant economy is strong, active, and prosperous.
The opposite of this is an economy that is struggling, suffering, or in difficulty.
Among the options,
distressed means suffering from extreme anxiety, sorrow, or setback.
So a distressed economy is the direct opposite of a buoyant economy.
The other options do not express the correct opposite meaning here.
Answer:B. distressed