Read the summary about factory work during the industrial revolution.

factory work was not easy. most working conditions were not ideal. first of all, it involved long hours. typical factory workers put in twelve-hour days, six days a week, and there were few holidays. moreover, most workers had to do the same simple tasks over and over each day. at the same time, they had to work fast to keep pace with the machines they tended. finally, factory work could be dangerous. fingers, hair, and clothing often got caught in the many gears and belts of machines, making accidents common. also, textile mills were filled with cotton dust, which damaged the lungs of the workers who breathed it in.

which sentence provides key details that support the central idea of this excerpt?

factory work was not easy.

most working conditions were not ideal.

finally, factory work could be dangerous.

fingers, hair, and clothing often got caught in the gears and belts of machines.

Fingers, hair, and clothing often got caught in the gears and belts of machines.

The main idea of the excerpt is the fact that factory work was difficult. This statement does not provide details, it only states the thesis. Therefore, we cannot choose option 1.

Option 2 and 3 similarly restate the main idea. They emphasize the fact that factory work was unpleasant, but they do not provide key details that tell us why the work was undesirable.

Option 4 provides these details, by telling us that fingers, hair and clothing often got caught in the gears and belts of the machines.

Pretty sure its B. most working conditions were not ideal.

Explanation:

think about it, when you read this paragraph, the sentence "most working conditions were not ideal " it pretty much summarizes it:

Factory work was not easy. Most working conditions were not ideal. First of all, it involved long hours. Typical factory workers put in twelve-hour days, six days a week, and there were few holidays. Moreover, most workers had to do the same simple tasks over and over each day. At the same time, they had to work fast to keep pace with the machines they tended. Finally, factory work could be dangerous. Fingers, hair, and clothing often got caught in the many gears and belts of machines, making accidents common. Also, textile mills were filled with cotton dust, which damaged the lungs of the workers who breathed it in.

assessment is the missing word