1 = C
2 = E
3 = A.
4 = B.
5 = D.
"<span>D. Runners used an intricate road system to carry messages from one part of the empire to another" would be the only true statement, since communication was essential for an empire such as this. </span>
The amount of back injuries equals approximately 20%. There are around a million injuries and illnesses each year because of work and approximately 20% which is around 200 000, are related to back problems. Sometimes it's falling and hurting yourself and sometimes it's accumulated stress.