Answer:
B.
Step-by-step explanation:
The correct command is ldconfig. When a necessary library is not installed, ldconfig will list it as not found. This command is used to configure dynamic linker run-time bindings and cache. It maps shared libraries, creating the necessary links and cache to execute them efficiently. By default, ldconfig caches libraries in the /etc/ld.so.cache file, improving the overall system performance. In case of a missing library, it will show an error message, listing the dependencies that need to be installed to resolve the issue.