Javaid can shovel a certain driveway in 50 minutes. If mohsin can shovel the same driveway in 20 minutes how long will it take them to shovel the driveway if they work together?

1. A Option A: 12
2. B Option B: 13
3. C Option C: 14
4. D Option D: 14.28
5. E Option E: 18

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