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For answer  A 

The longitudinal marking consisting of a broken line, single or double, allows crossing over it. The longitudinal marking consisting of a continuous line, single or double, prohibits violating it. However, when the longitudinal marking consists of a continuous line and a broken one next to each other, the driver of the vehicle must respect the meaning of the line that is closest in the direction of travel.

Therefore, you can cross with the motor vehicle over a continuous line only if this line is accompanied by another broken one, and the broken one is closer to your direction of travel, in which case the longitudinal marking may be violated. If the line closest in the direction of travel is the continuous one, violating the longitudinal marking is prohibited.

For answer  B  and  C 

Violating or crossing over the marking consisting of a continuous line, whether single or double, is prohibited. This prohibition is not conditioned by the number of lanes per direction that the public road has or whether it separates the directions of travel or the lanes of travel on the same direction.

The correct answer is: A

Recommendations:

Road markings - Audio-Video Lesson --> Road Traffic Code - Road markings

For answer  A 

Regulation** - Article 77

[...]
(2) The longitudinal marking consisting of a continuous line, single or double, prohibits violating it.

Regulation** - Article 78

The longitudinal marking consisting of a broken line, single or double, allows crossing over it, if the maneuver or the established regulations require this.

Regulation** - Article 79

[...]
(3) In the case of the longitudinal marking consisting of a continuous line and a broken one next to each other, the driver of the vehicle must respect the meaning of the line that is closest in the direction of travel.
[...]

For answer  B  and  C 

Regulation** - Article 77

[...]
(2) The longitudinal marking consisting of a continuous line, single or double, prohibits violating it.
[...]

Regulation** - Article 79

[...]
(2) The continuous line is used in the following situations:
a) the single continuous line, for separating the directions of travel, the lanes of the same direction when approaching intersections and in dangerous areas;
b) the double continuous line, for separating the directions of travel with at least two lanes on each direction, as well as on roads with one lane per direction or in other situations established by the administrator of the respective road, with the consent of the traffic police.
[...]

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