To increase the magnifying power of a telescope ($f_o$ = focal length of the objective and $f_e$ = focal length of the eye lens):
- A$f_o$ should be large and $f_e$ should be small
- B$f_o$ should be small and $f_e$ should be large
- C$f_o$ and $f_e$ both should be large
- D$f_o$ and $f_e$ both should be small
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