Ա is on the left side, and there stopping is allowed only in populated areas. Բ is on the roadway, where you stop when there is no shoulder. Գ is correct: to stop, you may cross the 
Under the Rules, stopping is allowed on the right side of the road, on the shoulder (clause 78); you may stop at the edge of the roadway only when there is no shoulder. In addition, on a two-way road, stopping on the left side is allowed only in populated areas (clause 79).
Since this road is outside a populated area, stopping on the left side (trajectory Ա) is prohibited. Since there is a right shoulder, stopping on the roadway (trajectory Բ) is also prohibited. Therefore, only stopping on the right shoulder (trajectory Գ) is correct.
This rule helps keep the roadway of high-speed roads free of parked cars.
Option 2. Trajectory Ա is wrong, because outside populated areas stopping on the left side of a two-way road is prohibited.
Option 3. Trajectory Բ is wrong, because when there is a shoulder, you must stop on it, not on the roadway.
Option 4. Trajectories Ա and Բ are wrong, because they break the rules for stopping on the left side and on the roadway.