The correct answer is answer C ("In the 1980s").
Computers started reaching homes and businesses on a bigger scale during the eighties. The difference was made when IBM brought to the market the revolutionary concept of a Personal Computer (PC), which for the first time allowed a single user to operate a computer. Before then, the user would give commands to a mainframe computer and a whole team would have process the request and operate the machine in order to bring results.
Hope this helps!
A, we didn't want to join the war unless we had to, in this case we were attacked so we declared war on Japan the next day
Brown v. Board of education
Hope it helps