B...............................................
Hm..history questions like this are my weak point but i would probably say the reserve requirement?
France first attempted to build the canal in the 1870s. He left quite a few diseases and financial problems behind. Ferdinand de Lessups was the engineer who designed the Suez Canal.
In general, yes, immigration during 1830s to 1840s was vital to the industrialization of America, since it was mostly immigrants who first sought employment in the factories that were an essential element of industrialization.
