If 0 < a < b < 1 which of the following is (are) true I- a-b is negative II- 1/ab is positive III- 1/b-1/a is positive?

1. A Option A: I only
2. B Option B: II only
3. C Option C: III only
4. D Option D: I & II only
5. E Option E: I II & III

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