Stopping is prohibited if the distance between the car and a 
Under the Rules, stopping is prohibited if the distance between a solid line and the stopped vehicle is less than 3 meters (clause 84); at 3 meters or more it is allowed. 2.5 meters is below this limit, so stopping is prohibited. This rule makes sure other cars have enough room to drive around the stopped car without having to cross the solid line.
Option 1. A distance of 6 meters is more than the 3-meter minimum, so stopping is allowed.
Option 2. A distance of 5 meters is more than the 3-meter minimum, so stopping is allowed.
Option 3. A distance of 4 meters is more than the 3-meter minimum, so stopping is allowed.
Option 4. A distance of 3.5 meters is more than the 3-meter minimum, so stopping is allowed.