Step 3 » GENERAL learning environment Category D (D, D1, Tb, Tv)

The traffic participants are obliged to notify the administrator of the public road or the nearest police unit when they are aware of the existence on the road of an obstacle or of any other dangerous situation for the flow and safety of traffic. It is not mandatory to emit acoustic signals or to signal the traffic participants travelling from the opposite direction.

The correct answer is: C

Recommendations:

Obligations and prohibitions of the drivers of vehicles during travel - Audio-Video Lesson --> Traffic Code - Obligations, prohibitions and aggressive driving

For answers  A  and  B 

Regulation** - Article 112

The drivers of vehicles signal with the means of luminous, sound warning or with the arm, as the case may be, before performing any manoeuvre or for avoiding an immediate danger.

Regulation** - Article 113

(1) The means of sound warning must be used from a distance of at least 25 m in relation to those they are addressed to, for a duration of time that ensures the perception of the signal and without determining them to manoeuvres that can endanger the safety of traffic.
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For answer  C 

Regulation** - Article 96

(1) The traffic participants are obliged to notify the administrator of the public road or the nearest traffic police officer when they are aware of the existence on the road of an obstacle or of any other dangerous situation for the flow and safety of traffic.
(2) Is prohibited the any person to throw, to leave or to abandon objects, materials or substances or to create obstacles on the public road. The person who could not avoid creating an obstacle on the public road is obliged to remove it and, if it is not possible, to signal its presence and to notify immediately the administrator of the public road and the nearest police unit.

** Regulation = REGULATION for the application of OUG 195/2002 updated (Traffic Code Regulation)