Final answer:
To open the passenger door from the outside, you need to press the trigger plate on the external handle and pull the handle upwards. The correct multiple-choice option is (a).
Step-by-step explanation:
When opening the passenger door from the outside, you press the trigger plate on the external handle and simultaneously pulling the handle upwards. This action triggers the mechanism that releases the latch and allows the door to open. This is a common design for passenger doors on cars and other vehicles. By pulling the handle, you apply a force on the door that creates a torque, causing the door to rotate and open. The correct multiple-choice option is (a).