"urban sprawl" was accidentally created in post-world war ii america mainly to which of these?
a) end of the cold war
b) greater shopping opportunities
c) more fuel-efficient automobiles
d) expansion of the highway system

The answer for your question is : D. Expansion of the Highway system

Urban sprawl refer to the migration from a more population city to a Less crowded and populated residential area

The expansion of the highway system making it possible for the city workers to go work everyday while living in the suburb at the same time