Question: Select all that apply: which of the following are examples of traits in Dinosaurs that are theorized to have been used for male-male competition? Need Assignment Help? Option A Hollow crests of Lambeosaurines Option B Osteoderms of Titanosaurids Option C Horns of Ceratopsians Option D Tail clubs of Ankylosaurids Option E Dome skull of Pachycephalosaurians Option F Fore-arms of Tyrannosaurids