Final answer:
The correct distance to use a turn signal before making a turn is at least 100 feet, which is about 30 meters. The options provided do not include this distance. Safety in crossing a street depends on vehicle speed and stopping distance; 28 meters is an unsafe distance to begin crossing in front of an oncoming car.
Step-by-step explanation:
Before making a turn, the driver should use the turn signal at a distance of at least 100 feet before the turn in urban or residential areas, which is approximately 30 meters. For your question, option 3) 25 feet is significantly less than the distance recommended by traffic laws, and neither option 1) 50 feet nor option 2) 75 feet meet the typical 100 feet guideline. Therefore, the correct distance is not listed in the options.
When it comes to crossing a road safely, it is essential to consider both the distance of oncoming cars and their speed. Assuming a car is traveling at a moderate speed and it takes approximately 3 seconds to cover 50 meters (as observed by Bridget), the safety to cross will depend on the reaction time and stopping distance of the vehicle. If a car is 28 meters away, this would be unsafe to cross, as this is less than the distance observed by Bridget and cars might not have sufficient time to stop.