To answer this question, the user needs to have knowledge of SQL functions.
A. to_char: This function is used to convert a number or date to a string. It cannot operate on any datatype.
B. max: This function returns the maximum value in a set of values. It can operate on any datatype.
C. cube: This function is used to generate a result set that represents the subtotals and grand totals of the selected columns. It cannot operate on any datatype.
D. rollup: This function is used to generate a result set that represents the subtotals of the selected columns. It cannot operate on any datatype.