Who used lassos, lariats, steel spurs, and saddles? a) female homesteaders b) women suffragists c) immigrants working on the railroad d) cowboys and gauchos e) american indians

A lariat or lasso is a closing loop made of rope used for the controlling of cattle.  Steel spurs and saddles are used by riders to make riding horses easier.  

Therefore the correct answer would be whoever worked with cattle, and rode horses.  This makes D Cowboys and Gauchos the correct answer.