How Do We Know That Dinosaurs Had Lice

Multiple Choice

How do we know that dinosaurs had lice?

A) Dinosaur fossils show clear evidence of louse eggs and bites.
B) Lice are found only in birds and mammals. The common ancestor that lice evolved on must have been the common ancestor of these two groups, a dinosaur.
C) Dinosaur DNA has been found in the guts of fossilized lice.
D) The DNA of both mammalian and bird lice contains sequences that are unique to dinosaur DNA. Lice can only have obtained these sequences if they lived on dinosaurs.