To accurately determine the economic impact of the trade agreement, it's essential to consider the context and details of the specific agreement in question, such as its terms, the countries involved, and the economic conditions before and after its implementation. Since the question does not provide specific details, one response cannot be definitively identified as correct over the others based solely on the information given.
However, generally speaking, many trade agreements are designed to increase trade flows by reducing tariffs and barriers, which often leads to an increase in both exports and imports over time. Therefore, if you have to choose one of the provided responses without additional context, the most typical expectation from a trade agreement would be:
The agreement caused both exports and imports to increase over time.
This response reflects the common intention of trade agreements to foster economic exchange.