How can wing flutter be prevented?

Question

Question ATPL - Airline Transport Pilot license - Principles of Flight

QuizVDS · Accepted Answer

By locating mass in front of the torsion axis of the wing

QuizVDS · Answer

By increasing the aspect ratio of the wing

QuizVDS · Answer

By mounting the engines on the fuselage

QuizVDS · Answer

By installing the fuel tanks in the fuselage

Id 16 - ATPL - How can wing flutter be prevented?