What command should Sara use to run a container with the busybox image, passing a custom command?

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To run a container with the busybox image while passing a custom command, the correct approach is demonstrated in the chosen answer. The syntax for running a container allows you to specify the image and any commands you wish to execute within that container.

In this case, docker run busybox echo "Docker is great!" correctly utilizes the docker run command to start a new container from the busybox image and specifies echo "Docker is great!" as the command to execute inside that container. The command provided appears after the image name, which is the expected format for Docker.

The inclusion of double quotes around the message ensures that the entire string is treated as a single argument to the echo command, meaning it will display correctly as output. In scenarios where commands include spaces or special characters, using quotes is critical for ensuring proper interpretation.

When it comes to the other options, they deviate from this standard format. The lack of quotes in some options can lead to improper interpretation of the command. In particular, options that include phrases without quotes or unnecessary parameters may lead to syntax errors or unintended behaviors when the command is executed.

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