Answer:
Step-by-step explanation:
The correct answer is a. The Maginot Line was a system of fortifications built by France along its border with Germany after World War I to protect itself from a potential German invasion. The line was a series of concrete and steel fortifications, underground bunkers, and obstacles that stretched for hundreds of miles along the border. The line was designed to force any invading army to go around it, rather than through it. Despite its impressive engineering and cost, the line ultimately failed to stop the German invasion in World War II, as the Germans simply went around it by invading through Belgium.