Final answer:
The feedback control giving EA immediate information on performance relative to competitors is monitoring the daily number of game downloads on its platform.
Step-by-step explanation:
The option that represents a feedback control that would provide Electronic Arts (EA) with immediate information on its performance relative to competitors is (a) Monitoring the daily number of game downloads on EA's platform.
This method allows EA to have real-time data on how well its games are performing in terms of user engagement and popularity, which is a direct indicator of market competition. Other options like analyzing annual revenue growth or examining quarterly expenses provide valuable data but are not as immediate. Long-term employee satisfaction is important for internal assessment but does not offer immediate information on performance against competitors.