Mill’s theory of morality has been charged with being Godless. Why would someone say this about Mill’s theory and what is his response to this charge?

Provide, describe and explain an ethical example that significantly challenges Mill's moral theory. Use Mill's theory to either resolve this challenge in terms of his ethical system or explain why you think it is unsolvable through the theory of utility.

Describe and explain in detail Mill's moral theory. Be sure to include in your answer his criteria of morality, a discussion of ends, means, higher and lower pleasures.

I have a final coming soon and am not sure what questions I will have on it. These questions are part of a study guide, it is not ACTUAL homework. I want to develop a better understanding on the Philosopher John Stuart Mill. Therefore, if someone could help me expand my knowledge on him and help answer these questions I would greatly appreciate.