N/A
A. unable to both be true at the same time.
A. one that inspires fear , panic or horror
A. oil production.
D. arabian sea , red sea , and caspian sea.
The best explanation why the area between Spain and Gaul was not part of the Roman empire until that later period was a culmination from both undesireability and difficulty in accessing this region due to its mountaineous nature. So I would wager the answer being both C and D - undesireability and difficulty in access.
It was Homo erectus.
This species is extinct. It is believed to be the first fossil about 1.9 million years ago. Many believe it looks like an ape. Homo erectus is the ancestor of morden human beings.