Q: In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].
(CNN) Education has long been the fuel that powered the mighty engine of our nation's economy. As the number of Americans with high school and college degrees soared right after World War II, our middle class grew dramatically and the United States reached new heights of job creation, productivity and prosperity, becoming the envy of the world. But today American students are falling far behind those in other nations. Why? Our schools are failing to prepare graduates for our increasingly competitive global economy. Improving our nation's education system will be a major bipartisan challenge for the incoming Trump administration, as well as for Congress, the states and, most importantly, individual school districts.Harold Levy: Our schools are failing to prepare graduates for our increasingly competitive global economy.Improving the education system will be a major bipartisan challenge for incoming Trump administration, writes Levy 
 Question:In 2015, among all 73 nations and economies where the test was administered to 540,000 students, _ students dropped to 40th place in math, and placed 25th in science and 24th in reading.
A:
Americans