问题如下：
What type of error appears to be present in the IPO Date column of Exhibit 1?
选项：
A. invalidity error.
B. inconsistency error.
C. non-uniformity error.
解释：
C is correct. A non-uniformity error occurs when the data are not presented vin an identical format. The data in the “IPO Date” column represent the IPO date of each firm. While all rows are populated with valid dates in the IPO Date column, the dates are presented in different formats (e.g., mm/dd/yyyy, dd/mm/yyyy)
