Which sign indicates that you should be prepared to stop?

Answer: B — Yield sign

The correct choice is a yield sign, which indicates that drivers must prepare to stop or yield to oncoming traffic before proceeding. When approaching a yield sign, you should assess the traffic situation and control your speed, being ready to stop entirely if necessary. It effectively communicates to drivers that they must yield the right of way, meaning they should give way to other vehicles or pedestrians in the intersection or road ahead. In contrast, a speed limit sign provides information about the maximum speed allowed in a specific area but does not indicate that stopping is required. A stop sign explicitly instructs drivers to come to a complete halt before continuing, while a no entry sign indicates restrictions on entering a roadway. These other signs serve different purposes and do not convey the same need to prepare to stop.