Both are correct. Example sentences below.
In three hours, we will arrive at our house.
In three more hours, we will arrive at our house.
When using "more", it implies that there was time that was previously passed.
C. Necessary is the answer
1.=to take control of someone
2.= to separate an idea or statement into smaller parts in order to make it easier to understand
4. =done with great effort and difficulty
to order again because the prefix re means again and the root word mand means order :)
