Which warning sign would suggest to a motorist that they should be aware of an upcoming yield?

The correct choice highlights a sign that provides specific guidance to motorists regarding the upcoming yield situation. When a sign indicates the distance to a "Give way" ahead, it alerts drivers that they will soon encounter a point where they must yield their right of way. This advance notice allows them to prepare for the change in driving conditions and make necessary adjustments to their speed and awareness of surrounding traffic.

The other options describe different types of warning signs that cater to various driving situations but do not specifically relate to yielding. For instance, signs indicating crossroads inform drivers about upcoming intersections, while those indicating road narrowing alert motorists to reduced lane width. Signs for view obstructions highlight potential visibility issues ahead, but none of these options mention the requirement to yield. Therefore, the choice about the distance to a "Give way" is uniquely pertinent to the context of yielding, making it the most appropriate answer.