Which factor made it most difficult for soldiers to cross the area between the trenches?

The area between opposing trenches was known as no man’s land. It was extremely dangerous because it could be mined and was exposed to artillery, shelling, and gunfire from both sides. That danger made crossing it difficult, so the correct choice is “The land was mined territory and was subject to artillery, shelling, and gunfire.”

AI-written and checked against the verified answer.