Examine the scenario.

Question

A scientist wishes to discover whether dinosaurs were warm-blooded or cold–blooded. However, he cannot directly perform any measurements or experiments because dinosaurs are extinct.
What aspects of scientific thinking can help him study this question and still follow the scientific method?
(Select all that apply)
practice deductive reasoning by studying living warm- and cold-blooded creatures
practice skepticism and avoid accepting any opinions as an absolute fact
practice empiricism and avoid practicing any other methods
practice rationalism in order to formulate explanations

A,D?