What vital means of transportation invented in the 1830s served to whisk wealthy city-dwellers away from their poor neighbors and out into the suburbs and countryside whenever possible?

Trains, steamships, cars and bridges.

Explanation:

All of these means of transportation helped to carry goods from one place to another, allowing people to trade and expand their commerce. They were also a good way to move rapidly from one place to another. This became a huge improvement in order to benefit the nation's economy.

d: social contract theory

the right answer for the question that is being asked and shown above is that: "their policy of "divide and rule" pitted political groups against each other to keep any one group from becoming too powerful.  " the  participant in european imperialism is being described below is that  their policy of "divide and rule" pitted political groups against each other to keep any one group from becoming too powerful.