Compared to the american federation of labor, the knights of labor faced difficulty because it
suffered from disputes between skilled and unskilled workers.
had a larger membership, which made it more difficult to organize.
lacked a strong, committed leader.
refused to allow certain groups to join.

ty

Explanation:

all right, the foundation, the knights of labor faced difficulty because the mission of them was group workeers unskilled, specially black mans, what justificied your existence, was an association, including black mans in difficultes of to get work. Considered the education, solidarity and help among the works. Inside of the foundation had a group, The direction of the order of the fund, did not want the participation of the workes in the politic struglle.

A

Explanation:

the steam engine.

the locomotive.

the telephone.

the telegraph.

the internal combustion engine.

the rifle.

ironclad ships.

electricity/light bulb.