The correct answer is b In the nineteenth century the knight of labor aimed to bring all types of workers to a union to improve working hours and working conditions for laborers. It aimed at uniting skilled and unskilled workers into a union.However, unlike the knight of work the american federation of labor focused on improving of wages, working hours and also avoiding general social reforms.
Avicenna's main contribution was within (D) philosophy. Avicenna made significant strides in his ideas of metaphysical doctrine and the existence of God.
