The correct answer is D) The course of an approaching vessel does not change.
According to the Navigation Rules, a risk of imminent collision exists in the following situation: when the course of an approaching vessel does not change.
If you like to operate boats, then you need to read the document that publishes the United States government in this regard. It is called the Navigation Rules. And you can buy it in any store that sells boating supplies. A copy of this document should always be aboard the vessel. The most important thing is to minimize the risk of collisions and accidents. You have to learn your obligations and what to do in certain situations.
