What was the main purpose for using the small boats in the rescue operation?
​
A
The small boats were piloted by regular citizens and therefore allowed the British soldiers to do their job of fighting the German army.
B
The small boats were harder to see at night and thus could more easily avoid the German attacks from the ground and the air.
C
The small boats, as a group, could hold a greater number of soldiers than the bigger boats belonging to the British navy.
D
The small boats could get close to the beach and transfer the soldiers to the bigger boats that had to stay in deep water.