Final answer:
Microsoft Defender for Containers provides environmental hardening, vulnerability assessment, and run-time threat protection to secure containerized applications, corresponding to option [C].
Step-by-step explanation:
Microsoft Defender for Containers provides a range of security features to protect containerized applications. Among the capabilities offered by this tool, it includes environmental hardening, vulnerability assessment, and run-time threat protection. This aligns with option [C] from the listed choices. Environmental hardening refers to the process of securing a system against attacks by reducing potential vulnerabilities. Vulnerability assessment involves the process of identifying, quantifying, and prioritizing vulnerabilities in a system. Run-time threat protection then offers real-time security against threats that may occur while the containerized applications are running. Together, these capabilities enable strong security measures against both potential and active threats to Microsoft container environments.