170. It is clear from the passage that Harry Houdini... A) used to buy all his chemicals in Indian bazaars
B) was the least safety-conscious chemist of the Victorian era
C) was an Indian who performed his tricks mostly in Europe and the USA
D) was a famous magician who lived about a hundred years ago
171. It is understood from the passage that.... A) famous magicians such as Houdini perform in Indian bazaars
B) Houdini cheated his audiences because he did not use chemicals instead of real magic
C) Houdini's kind of magic died out because it was boring, due to its extreme safety
D) the sort of magic Houdini performed a century ago can be seen in India today