Were the vikings the first europeans to make contact with north america?

Half a millennium before Columbus “discovered” America, those Viking feet may have been the first European ones to ever have touched North American soil. Exploration was a family business for the expedition's leader, Leif Eriksson (variations of his last name include Erickson, Ericson, Erikson, Ericsson and Eiriksson).

the graph shows the spread of railways in the 1800s.

based on the graph, the conclusion that can be drawn about germany is answer d)   by 1880, germany had more rail lines than great britain and russia.