Option B
Explanation
Straight-in parking is an approach of parking where vehicle is approached and parked safely in between the guiding lines. It thus helps to prevent blockage of cars. Each car can move in and out freely preventing it from congestion.
Straight-in parking is the most traditional approach of parking which saves time for drivers, allows for two-way traffic as well as driver can line up from multiple angles. Hence option B is the most appropriate one.