I believe the answer is slavery
Answer B boom towns
To start answers C and D make absolutley no sense so they are out of the pictrue leaving us with C and D
Oil wells dont have populations you cant live in or at an oil well however boom towns makes sense for the first characteristic.
You may think Boom Towns doesnt make sense for characteristics 1 and 2 however the phrase boom town was coined during Oklahoma's oil rush.
The awnser is B trust me
Factory conditions were so bad because they didn't have the technology nor the knowledge we have today to run a decent factory. the owners were concerned about profits then a worker's safety. and since workers rights weren't written at the time, the owners got to treat the workers howecer they pleased.
I believe the answer is D. MlK was fatally shot while standing on his hotel patio after giving a speech.
