The correct option is D What makes the gods express their anger through volcanoes
"Confronted by many problems presented by, let us say, an active volcano, we may risk; what are the lavas made of? How does the volcano work and how is the heat generated? Where do the lavas
and gases come from? When did the volcano first begin to erupt and when is it likely to erupt again." - from this paragraph in the passage we can deduce that scientific workers when confronted by problems posed by an active volcano will not ask the question 'what makes the gods express their anger through volcano'. So, option C is the answer.