Pretty sure it is B. 600 A.D
1 pint = 16 fl oz. Therefore, 2 pints=32 oz, 3 pints= 48 oz, etc.
It is a fixture that you see every day in plumbers' shop windows. Whether Mr Mutt with his own hands made the fountain has no importance. He CHOSE it. He took an ordinary article of life, placed it so that its useful significance disappeared under the new title and point of view – created a new thought for that object.
D. Having telephones in the lobby in order to call residents
2a^n+1 purrrr that’s the answer