Map the following units of various physical quantities to whether they can be considered good unit or not.
A
Metric Foot(Length)
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B
Tithi(Lunar Day)
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C
Cow's Grass(Area)
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D
Dog Year(Time)
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Solution
A good unit's parameters are reproducability, standardization and the ease of access. Cow's grass is the area, a cow can graze on an average in a day. A dog year is an equivalent average life cycle of a dog in calendar years.