I believe this would be Upper paleolithic because the creation of the tools and using them would quickly help them to establish the Neolithic era creating tools out of metal rather than stone.
Answer:
Get more into real life situations. For example something that will make this decade more interested. Instead of something for 1875 that everyone will get bored of.
Explanation:
Answer:
If it is a multiple choice answer, then b and d.
If not, I think b.