Answer:
D. It motivated Christians to undertake reforms to protect and help the poor.
Explanation:
During the Progressive Era, the Social Gospel Movement had the most significant influence in encouraging reform movements.
These reform movements usually helped the poor, in areas such as employment and working conditions.
For example, the movement inspired reforms in child labor laws, wages, and working conditions in factories.
These reforms directly influenced the lives of the poor.
So, the correct answer is D.
