Which choice best describes data from the graph that weaken the stude…

Source Texts

Text

To measure whether countries in free trade agreements (FTAs)—agreements among nations to reduce tariffs, duties, and other trade barriers—experience changes in total agricultural exports, economist Kayode Ajewole and colleagues calculated average export growth rates for several countries over the five years before and the five years after the countries joined FTAs. A student reviewing the researchers' findings claims that joining an FTA invariably leads to a higher rate of growth in agricultural exports.

Which choice best describes data from the graph that weaken the student's claim?

Although agricultural exports from Mexico decreased over the five years before NAFTA, a reversal in this trend was observed over the five years after Mexico joined NAFTA.

All the countries shown had positive growth in agricultural exports over the five years after joining their respective FTAs, but their rates of export growth varied.

Over the five years after Costa Rica joined CAFTA-DR, agricultural exports from Costa Rica grew at a rate of about 13.5 percent, which is higher than the rate over the five years before Costa Rica joined the agreement.

Although agricultural exports from Canada grew over the five years after Canada joined NAFTA, their growth rate was even higher in the five years before NAFTA.