Durkheim Found That Predominantly Catholic Nations Had Lower Suicide Rates

Durkheim found that predominantly Catholic nations had lower suicide rates than predominantly Protestant nations, and that married people had lower suicide rates than single people. Noting that both Catholics and married people are more socially integrated than their counterparts, he theorized that the more socially integrated a group, the lower its suicide rate. What type(s) of reasoning is this?

A) deductive reasoning
B) inductive reasoning
C) neither deductive nor inductive reasoning
D) both deductive and inductive reasoning