单选题 Why has President Bush's ban on lie detector evidence in military courts in 1991 been overturned?______

A、 Because lie detection is surrounded by uncertainties
B、 Because it restricts the defendants' rights to prove that they are innocent
C、 Because 12 states also allow lie detection evidence to be heard in courts
D、 Because federal judges from the Supreme Court make their decisions on the basis of lie detection evidence

【正确答案】 B

【答案解析】第二段第二、三句指出，1991年，布什总统禁止在军事法庭使用测谎证据，但该禁令后来被美国军事上述法庭推翻，理由是它限制了被告提供他们无罪证据的权利。