Based on the description of the graph, the most appropriate statement to describe the economic impact of the trade agreement is:
The agreement caused imports from the U.S. to increase but led to a decrease in exports.
This choice aligns with the observed trend where U.S. exports to CAFTA-DR nations increased, while the exports from CAFTA-DR nations to the U.S. initially remained lower, indicating a potential imbalance in trade favoring U.S. exports. However, since you mention that exports to the U.S. began to rise in 2008, the statement might not fully encapsulate the situation if interpreted strictly. If the intention is to reflect the initial trends leading up to 2008 (where U.S. exports were initially higher), this option could still apply.
If the exports from the U.S. continued to surpass the exports to the U.S. even after 2008, then a clearer statement would recognize that the trade agreement does not necessarily lead to a decrease in exports overall, but rather reflects differing trends in export growth rates. Given that both imports and exports trends seem to fluctuate over the years, it's essential to analyze the continued trends beyond 2008 for a precise conclusion.