All of the following are reasons for the rise of suburban development in the 1950s EXCEPT

In the postwar era, many Americans moved away from cities and into suburbs, ... World War II had gobbled up all of America's production for four years. ... Was it due to financial reasons, messages in popular culture, or something else? ... 1950's was free market enough to enable the sorts of developments we saw, such as .

offline recommendation systems option b

because recommendation systems produce a list of two ways

1. through collaborative filtering

or

2. through content-based filtering

the answer is c, all the other options are things they are known for.

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