Question

during the early part of the industrial revolution, factory managers were
often strict but generally fair to workers.
always hard working and uncomplaining.
frequently untrained and undisciplined.
generally harsh and abusive to workers.

Explanation:

During the early Industrial Revolution, factory managers were often harsh. Workers faced long hours, poor conditions. Managers aimed for profit, using strict, sometimes abusive methods. Workers had little power. Options like "strict but fair" (no, exploitation common), "hard - working uncomplaining" (focus on managers' behavior to workers), "untrained undisciplined" (not main trait - focus on treatment) are incorrect.

Answer:

generally harsh and abusive to workers.