question_answer

The American soldiers were digging shallow trenches right in the middle of the track. Chinhohong wondered what they were up to. Surely, they were not digging slit trenches in the middle of the open track. But their purpose was soon apparent. They were obviously putting down AP mines and laying body trap wires along the track. Fascinated, Chinhohong watched the little khaki figures working with the jerky movements of mechanical toys. In no time at all, they had put in half a dozen brass AP mines and laid several strands of trip wire across the track. Then they had put back the earth and the leaves on the road to make the surface look undisturbed. They finished off soon after nine and then posting a sentry on either side of the bend they began to dig their foxholes on the opposite slope of the hill. Methodically, putting their heads close to the ground, they cleared the intervening undergrowth to give their guns an unrestricted field of fire. Their purpose was clear. They would sit in their foxholes, guarding the track, and ambush any enemy troops that happened to be walking along the track.

In a short time:

A) they had put in a dozen brass AP mines.

B) they laid few strands of trip wire.

C) they made the surface rugged.

D) they had put in half a dozen brass AP mines and several strands of trip wire.

E) None of these