Read the following passage, which contains a shift in tone:
One of the main reasons the Great Depression started was that after
the stock market crashed and the banks started to fail, people freaked
out and stopped buying st|ff. When people stop buying stuff, less stuff
is made, and there go theils, meaning even less buying. This
unfortunate spiral ed plunge the nation into bad times.
Which of the following revisions best corrects the shift in tone and maintains
a formal style throughout?