Final answer:
An appropriate distance to signal before turning on roadways is generally 100 feet, although this can vary. The provided multiple-choice options are not standard and make the question ambiguous. In the context of human sensory pathways, response times are typically a fraction of a second.
Step-by-step explanation:
The signal before turning should be provided well in advance to allow other drivers and road users sufficient time to react to your intended actions. Although the question does not specify the type of vehicle or road conditions, a general rule is to signal at least 100 feet before making the turn in city or residential areas where speeds are typically lower, and a longer distance on highways where speeds are higher. However, the options provided (50 feet, 5 seconds, 3 seconds, 400 feet) do not align with common standards, which usually recommends a specific distance rather than a time-based signal. Therefore, without further context or clarification, this question cannot be accurately answered.
For instance, if we use Bridget's observation of cars taking 3 seconds to travel 50 meters, we can infer that a signal should be given at least several seconds in advance to cover the necessary distance. Meanwhile, for a sensory pathway response time question (part 21), the correct answer is typically a fraction of a second, as human sensory responses and motor commands are very quick.