The knights of labor was a labor union founded in 1869. their motto was "an injury to one is the concern of all." how did the knights of labor show their commitment to this motto? a. by working to form unions for the chinese and other asian railroad workers b. by including the stockholders of major corporations in important union decisions c. by accepting african americans, recent immigrants, and women as members in their union d. by lobbying state and federal legislators to prohibit collective bargaining negotiations