How can you be sure that a device’s bootloader and system integrity has not been compromised? Select the correct answer, then submit.

Google's Key Attestation API is the most reliable method for verifying a device's bootloader and system integrity. It uses a hardware-backed attestation key to cryptographically sign statements about the device's security properties, including its bootloader state and OS version. This provides a strong, verifiable assurance that the device has not been tampered with. Checking the serial number only confirms the device's identity, not its integrity. Waiting for the device to boot to the passcode prompt doesn't provide any information about underlying system integrity. Manually checking the Android version against a carrier website is a superficial check and doesn't detect deep-level compromises.