The correct answer is B. Factory work prevented children from growing normally.
Step-by-step explanation:
In texts, a conclusion refers to the idea or point that can be deduced from multiple details in a text and that serves as a closure for the ideas presented. In the case of the passage in the question, the details on it describe the effects factory work had on children this included the spinal column that bent in a different position, the legs and pelvis that curved and the whole body that changed in position. Also at the beginning of the paragraph, the author states "that its effects are injurious to the physical growth of a child". Therefore, the idea or point that can be deduced from this text and that details presented is that this type of work had negative effects on the physical growth or that "Factory work prevented children from growing normally".