Select the most appropriate meaning of the given idiom.

Smooth sailing

Easy progress

The most appropriate meaning of the given idiom "smooth sailing" is (1) Easy progress.

It means that something is going well and without any problems. It is often used to describe a situation that is progressing smoothly and without any obstacles.

For example, you might say that a project is smooth sailing if it is going well and on track.

The other options do not fit the meaning of the idiom.

• Calm weather means that there is no wind or waves.
• Comfortable place means a place that is pleasant and relaxing to be in.
• Plain dress means a dress that is simple and unadorned.