In_which_scenario_would_you_use_the_ROLLUP_operator_for_expression_or_columns_within_a_GROUP_BY_clause?$

• A. To find the groups forming the subtotal in a row
• B. To create group-wise grand totals for the groups specified within a GROUP BY clause
• C. To create a grouping for expressions or columns specified within a GROUP BY clause in one direction, from right to left for calculating the subtotals
• D. To create a grouping for expressions or columns specified within a GROUP BY clause in all possible directions, which is cross-tabular report for calculating the subtotals