C. Galileo provided observational evidence to support a theory originally created by Copernicus
Leonardo Da Vinci Would be the answer
To support your answer and give you credit when your teacher is grading your work.
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.
