Elisha G. Otis invented a safety device designed to stop the fall of an elevator..........supporting cable should break. O a. that which the O b. if its O c. might the O d. were its

Elisha G. Otis invented a safety device designed to stop the fall of an elevator..........supporting cable should break.

O a. that which the
O b. if its
O c. might the
O d. were its

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