Washington’s decision to free slaves originated from his
[A] moral considerations.
[B] military experience.
[C] financial conditions.
[D] political stand.
从最后一段“after observing the bravery of the black soldiers during the Revolutionary War…. ”可以看出Washington做出释放奴隶的决定是在他看见黑人士兵在独立战争中的英勇作战以后,因此B为正确选项