参考答案

正确答案：A
解析：利用“the first cases”作为答案线索词，在第二段找到答案所在句Dyslexia first Was recognized in Europe and the United States more than 80 years ago，该句说欧洲和美国在80多年以前首次发现阅读障碍症患者，与问题句The first cases of dyslexia in Europe were discovered less than a century ago吻合。