macOS has three layers of defense to________.

Apple structures macOS malware protection around three defensive layers. The first layer helps prevent malware from launching or executing through technologies including the App Store, Gatekeeper, and Notarization. The second layer identifies and blocks malware from running through Gatekeeper, Notarization, and XProtect. The third layer uses XProtect to remediate malware that has already executed. Therefore, the overall objective is to prevent, block, and remediate malware execution, making option B correct. macOS does not prohibit all third-party applications or restrict software exclusively to notarized App Store applications. Apple permits applications distributed outside the Mac App Store when they satisfy appropriate signing, notarization, and Gatekeeper requirements. The three-layer architecture provides defense before execution, during attempted execution, and after an infection has occurred.

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