The suggested answer is B.
When events are grouped by Event Receive Time, Reporting IP, and User attributes, the number of unique combinations of these three attributes determine the number of results. From the given exhibit, the unique combinations are: (09:12:11, 10.10.10.10, Ryan), (09:12:56, 10.10.10.11, John), (09:15:56, 10.10.10.10, Ryan), (09:20:01, 10.10.10.10, Paul), (10:10:43, 10.10.10.11, Ryan), (10:45:08, 10.10.10.11, Wendy), (11:23:33, 10.10.10.10, Ryan), and (12:05:52, 10.10.10.10, Ryan). There are eight events listed, but there are four unique groups: (10.10.10.10, Ryan), (10.10.10.11, John), (10.10.10.10, Paul), and (10.10.10.11, Wendy). Therefore, four results will be displayed.