Which of the following was a major factor in Chicago’s rapid growth? Many railroad lines connecting the east and west coasts ran through Chicago. Chicago’s location on Lake Michigan made the city an international port. The city’s large number of bakeries provided many jobs for new residents. Most employers in Chicago paid their workers high salaries.

the answer is c. your welcome.

the answer is a. physical map

i think i will need more detail to answer if this is a specific question on a test, but technology advancements are good for many industries, such as medicine or food industries, new technology could us in medicine in ways such as new scanners to tell us more about our bodies or new cures or vaccines for diseases.