But as recently as in 1968, jury selection procedures conflicted with these democratic ideals. In some states, for example, jury duty was limited to persons of supposedly superior intelligence, education, and moral character. Although the Supreme Court of the United States had prohibited intentional racial discrimination in jury selection as early as the 1880 case of Strauder v. West Virginia, the practice of selecting so called elite or blue ribbon juries provided a convenient way around this and other antidiscrimination laws.
The practice of selecting so called elite jurors prior to 1968 showed [A] the inadequacy of antidiscrimination laws
[C] the conflicting ideals in jury selection procedures
The practice of selecting so called elite jurors prior to 1968 showed_________
1. prior to 1968 （）
第二句也没有第二个元素，那就找第三句，第三句中找到了：the practice of selecting so called elite，这样第三句就是线索句（有资格和选项进行比对的句子！）
[B] the prevalent discrimination against certain races
But as recently as in 1968, jury selection procedures conflicted with these democratic ideals