Question: What is the effect on measurement result generation when the 'granularityPeriod' attribute of a 'simpleScanner' is set to 30 minutes, in terms of timing relative to the full hour?
Option 1: Measurement results are generated every 5 minutes, starting from an arbitrary minute past the hour.
Option 2: Measurement results are generated only once at the start of each full hour.
Option 3: Measurement results are generated every 10 and 40 minutes past the full hour.
Option 4: Measurement results are generated every 0 and 30 minutes past the full hour.
Explanation: According to the specified granularity periods, when the 'granularityPeriod' attribute is set to 30 minutes, the system synchronizes result generation with the full hour, leading to outputs at the top of the hour (0 minutes) and halfway through each hour (30 minutes). This ensures consistent and predictable reporting intervals.