In which cases should you apply the brakes only very carefully?

You chose all three answers, which is correct. On roads with loose chippings or sand, braking hard can cause your tires to lose grip and slip, so it's important to brake gently there. Similarly, tram tracks, sewer covers, and lane markings can be very slippery, especially when wet, so careful braking helps maintain control. Also, when driving with new tires for the first time, their full grip may not yet be established because the surface still needs to wear in a bit, so you should brake carefully to avoid skidding. Remember, in all these situations, gentle braking improves safety and prevents loss of vehicle control.