题目:
According to the passage, the congressional action of 1871 had which of the following effects?
选项:
A、 Native American tribal agreements were treated as legislation that had to be passed by both houses of Congress.
B、 The number of formal agreements negotiated between the federal government and Native American tribes decreased.
C、 The procedures for congressional approval and implementation of federal Indian policy were made more precise.
D、 It became more difficult for Congress to exercise unilateral authority over Native American affairs.
E、 The role of Congress in the ratification of treaties with sovereign nations was eventually undermined.
答案:
A