The correct answer is option C) "Collector of knowledge". Denis Diderot is as a French philosopher, art critic, and writer, known for his contribution he Encyclopédie, as a co-founder and chief editor. The contribution of Diderot to the Enlightenment is better described by the phrase "collector of knowledge" because among Diderot's works, the most relevant were his contributions to Encyclopédie, which main goal was giving knowledge to the people.