Try the following experiment. Ask a friend to drop a large handful of loose papers in the middle of a busy sidewalk, pretending that it is an accident. Observe from afar how many people stop to help your friend pick up the papers. Then try the same thing a second time, using the same or a ____ location at a similarly busy hour. This time, however, you should help pick up the papers, all the while pretending to be a stranger. You will probably find that when you help, others are more likely to help, too
A、other
B、similar
C、and
D、final