Answer:
Option b.had to work long hours.
Explanation:
The factory conditions were about production and profits. Very little of the worker's welfare was looked into. In fact, workers were exploited in most of these cases. Workers were subjected to the long hours without adequate compensation for their labor. The working hours were dangerously long. Sometimes workers spent long hours in unsafe conditions or exposed to toxins. For example, the coal mine workers were exposed to soot and dust.
