How did nations ensure that they exported more than they imported

If you import more than you export, more money is leaving the country than is coming in through export sales. On the other hand, the more a country exports, the more domestic economic activity is occurring. More exports means more production, jobs and revenue.

Explanation: If a country exports a greater value than it imports, it has a trade surplus or positive trade balance, and conversely, if a country imports a greater value than it exports, it has a trade deficit or negative trade balance.

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i think the answer is a.

go to settings and press notifications find the brain oh app and turn the switch so it would turn greyish silver color