It demonstrated the importance of loyalty to ones country the answer is C.
D because nationalism has bastion
Answer:The widespread use of machine guns and rapid-firing artillery pieces on the Western Front meant that any exposed soldier was vulnerable. Protection from enemy fire could only be achieved by digging into the earth. Assaults were carried out across "No Man's Land" between the opposing trenches.
Answer: The Ottoman Empire was the country that suffered the heaviest loss of civilian life,
Explanation: With over two million civilian deaths.
