It Took Several Decades for Advances in Computer Technology to Have

It took several decades for advances in computer technology to have a significant impact on the economy.This illustrates the fact that

A) Many technologies need to mature before they reach the point where they can have an impact.
B) Technologies cannot have an impact until government regulation catches up.
C) People are initially irrationally suspicious of new technology and refuse to accept it until some time has passed.
D) New technology is not really needed; it tends to be a way for retailers to boost sales by selling people things they do not really need.