Why might a 10% devaluation of a country's currency fail to improve its balance of trade deficit?

Why might a 10% devaluation of a country's currency fail to improve its balance of trade deficit?

• ক. Other countries devalue their currencies by 15%
• খ. Other countries revalue their currencies by 15%
• গ. The demand for the country's imports is elastic
• ঘ. The supply for the country's exports is elastic