So eager were american businessmen to get an enormous labor supply that they asked few questions about the effect of this "alien invasion" upon the old america inherited from the [founders]. they even stimulated the invasion artificially by importing huge armies of foreigners under contract to work in specified mines and mills. there seemed to be no limit to the factories, forges, refineries, and railways that could be built, to the multitudes that could be employed in conquering a continent.

which of the following best summarizes this biased paragraph objectively?
(a) us businessmen inflicted huge armies of foreigners on an unsuspecting america.
(b) the hordes of unskilled laborers brought in by mine and mill owners became an “alien invasion,” which i believe threatened america’s future.
(c) one way in which us businessmen acquired workers for their mines and mills was by offering contracts to groups of immigrants.
(d) if they could make more money or build more railroads, us businessmen didn’t care what happened to the america of our founders.