Which of the following were changes that happened during the 1950’s? a) fast food (mcdonald’s) b) rock and roll music c) the harlem renaissance d) television sets became the norm in most homes e) skyscrapers are now being built with the invention of the elevator f) the transcontinental railroad is finished.

answer; people where able to travel across the u.s.a faster than any other mode of transportation,travel time was about a week,from coast to coast

the triple alliance. germany and austria-hungary were already allies by 1879 when, worried about a threat from russia, they formed the dual alliance. italy joined the group in 1882. there was a concern about a possible attack from france and the alliance needed powerful friends to defend it.