题目内容：
According to be the passage，which of the following statements about the Tuskegee Airmen isTRUE?
A．In World War ll，they never lost a bomber to enemy fire． B．They were the first group of black soldiers ever trained by the ground troops．
C．They were not subjected to racial discrimination in the army．
D．my were already soldiers in the ground troops before their waining at Tuskegee begall．
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答案解析：