In the context of over-the-air (OTA) updates for software, what is the significance of the 'platform' key, and why is it important to specify it?
A. The 'platform' key is used to determine the specific hardware on which the OTA update should be applied.
B. The 'platform' key identifies the network through which the OTA update will be delivered.
C. The 'platform' key specifies the operating system version that the OTA update is compatible with.
D. The 'platform' key is necessary to define the security protocols for the OTA update process.