Which marking indicates the proper location for passenger pickup and drop-off?

Answer: C — Loading And Unloading Bay Lane Line

Passenger pickup and drop-off require a designated space where you can stop briefly without blocking through traffic. The loading and unloading bay lane line marks exactly that area at the curb, intended for quick stops so passengers can enter or exit safely. It’s different from a parking bay, which is for longer-term parking, a turn line which guides turning movements, and a bicycle lane which is reserved for cyclists. So this marking is the best indicator for where you should pause to pick up or drop off passengers.