You are presented with the quiz "Most of what do not kill their hosts?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "some parasites kill their host, but most do not" and "tapeworms Like flukes, tapeworms are also parasitic". So, what's the best answer to the question?

Choose from:
1). barnacles
2). tapeworms
3). cats
4). bacteria
5). fungi
6). Leptospirosis
7). fish
8). birds
The answer is:
2).