A passage is given with 5 questions following it. Read the passage carefully and choose the best answer to each question out of the four alternatives 

The Maginot Line was one of the largest military structures ever built, second only to the Great Wall of China. It was a series of bunkers, forts, turrets, and obstacles that spanned more than 450 miles of France's border with Germany. Built between 1930 and 1940, it was one of the world's most impressive forts, yet it proved to be almost useless.

The Maginot Line was named after the man who argued for its construction, French Minister of War André Maginot. André Maginot had fought with the French against the Germans in the First World War. Much of this conflict took place along the Western Front, which was a line of trenches across which the two sides faced one another. Both sides dug in deep and each lost many men over little ground. Conditions were horrid for all and there was a stalemate for many years as neither side was able to move the other.

Maginot never forgot these awful conditions. He wanted to build a line of defences that would give the French an advantage in a similar conflict. He feared, rightfully so, that the Germans would attack France again. Germany's population nearly doubled France's. The line of defences that Maginot pictured would allow a smaller French army to hold off a larger German force. In 1929, Maginot convinced the French Parliament to fund his vision.

Though calling it a line makes it seem thin, the Maginot Line was in fact quite deep. It was fifteen miles wide at some points and varied in structure. There were outposts disguised as houses. These were manned by troops and rigged with explosives. There were antitank rails and obstacles. These were planted in the ground to prevent tanks and trucks from passing. There were bunkers armed with mounted machine guns and anti-tank guns. These were for pushing back attackers. And there were many large and small fortresses along the line. Each had mess halls, lots of supplies, and air conditioning. The Maginot line would give the French a supreme edge in the case of a head-on invasion by the Germans.