Pick out the wrong statement.In an agitated vertical cylinderical reaction vessel, the

• A. ratio of liquid depth to tank diameter (i.e. the filling ratio) recommended for most purposes is 1.
• B. filling ratio for dispersing gas in a liquid is 2 for sufficiently long contact period.
• C. flat bottom and conical bottom vessels have low agitation efficiency for agitation of heavy solids in liquids.
• D. dished bottom vessel has very high power consumption.