Using Smartphones,one Can Watch the News,shoot Videos,browse the Internet,take Pictures,and

Multiple Choice

Using smartphones,one can watch the news,shoot videos,browse the Internet,take pictures,and listen to music.Improved features are added with each smartphone introduced by Apple,Samsung,LG,and others.As a result,customers often want to replace their existing smartphones with new models or brands every two years when their contracts expire.This increase in demand is due mostly to changes in ________,an environmental force.

A) competition
B) social culture
C) technology
D) regulations
E) the economy