Why are isotopes with long half-lives not useful for dating fossils or rocks that span the last glacial-interglacial cycle, approximately between 12,000 and 125,000 years old

Ibelieve it would be d. philosophy.hope it !

The telegraph idk what else to tell you you are probably just gonna copy it which btw i would do the same thing but it says i have to have at least 20 characters so yeah there you go