On this curve with reduced visibility, is it allowed to make a U-turn?

On this curve with reduced visibility, is it allowed to make a U-turn?
A)Yes, as long as it does not obstruct vehicles traveling behind.
B)No, under no circumstances.Correct
C)Yes, because there is no sign prohibiting it.
Making a U-turn is prohibited in any situation that prevents you from verifying that you will not endanger or obstruct other road users, even if there is no specific sign, such as on curves and crests with reduced visibility or in cases of fog or heavy rain.
U-turns are also prohibited at:
- Level crossings (they are not prohibited in their vicinity).
- Tunnels, underpasses and road sections affected by the "Tunnel" sign.
- Motorways and dual carriageways, except in places designated for it.
- On one-way roads and road sections.
- On all road sections where overtaking is prohibited, unless the U-turn is expressly authorized.