Refer to the exhibit. Which command, including arguments, is executed when the container starts?

In Docker, when ENTRYPOINT is defined as ['/bin/sh', '-c'] and CMD provides the shell command string, the runtime concatenates them so the container executes /bin/sh -c followed by that string at startup. The exhibit specifies a 30-second sleep value and the nginx daemon command, making /bin/sh -c "/bin/sleep 30 && nginx -g 'daemon off;'" the correct complete command executed when the container starts.

The sleep duration specified in the Dockerfile exhibit is 30 seconds, not 10; selecting 10 contradicts the value defined in the CMD or ENTRYPOINT instruction.

The shell interpreter defined in the exhibit is /bin/sh, not /bin/bash; /bin/bash would only be used if explicitly specified in the ENTRYPOINT instruction.

This syntax incorrectly splits the command, running /bin/sh -c "/bin/sleep 30" as one process and nginx as a separate shell invocation, which does not reflect how Docker merges ENTRYPOINT and CMD into a single command.