Does the sentence "Robert Blumenschine proposed the idea of confrontational scavenging, which involves challenging and scaring off other predators after they have made a kill, which he suggests could have been the leading method of obtaining protein-rich meat by early humans." provide a valid answer to the question "What does confrontational scavenging involve doing to other predators after they've made a kill?"

A: yes

Does the sentence "For example, in D4 above, once a reflection is performed, the square never gets back to the r2 configuration by just applying the rotation operations (and no further reflections), i.e. the rotation operations are irrelevant to the question whether a reflection has been performed." provide a valid answer to the question "When is it preferable to consider two group elements to be the same?"

A: yes

Does the sentence "The far East, a phrase containing a noun, East, qualified by an adjective, far, could be at any location in the "far east" of the speaker's home territory." provide a valid answer to the question "Until what year did the words near east and far east not refer to any particular region?"

A: no

Does the sentence "Notable exceptions include the Kerry slug and certain species of wood lice native to Ireland but not Great Britain." provide a valid answer to the question "Is the grass nake or the smooth snake native to Ireland?"

A:
no