Final answer:
The question asks for the required slowdown speed when approaching a stopped emergency vehicle, but the options provided do not match common regulations; therefore, the exact speed to slow down to is not given. Always refer to local laws for specifics.
Step-by-step explanation:
When you approach a stopped emergency vehicle with flashing lights on highways with speed limits of under 80km/h, the appropriate action is to change lanes if it is safe to do so and to reduce your speed. However, the correct reduced speed is not provided in the context given. Different jurisdictions may have different laws regarding the specific speed at which you must slow down. It is essential to be informed about local traffic laws, as they can vary by region. The general concept here is to ensure the safety of emergency responders by giving them space and reducing the risk of accidents.
For the purposes of schoolwork, if there is a prescribed answer expected by your curriculum or textbook, please refer to that for guidance. It's worth noting that while some jurisdictions mandate slowing to a specific speed like 60 km/h or 70 km/h, this particular question does not have a provided answer that aligns with common regulations. Always remember, safety and compliance with the law should be your top priorities when driving on public roads.