Question

if your vehicle breaks down, you should:
pull off of the road as far as possible, while still visible
turn on four-way flashers and open your hood (if not wet out)
place emergency flares/signs 100 feet around your vehicle
all of the above

Explanation:

When a vehicle breaks down, all the listed actions (pulling off the road, turning on flashers and opening the hood, placing emergency flares/signs) are standard safety procedures to ensure visibility and safety for the driver and other road users. So the correct option is the one that includes all these.

Answer:

D. All of the above (assuming the options are labeled A, B, C, D with D being "All of the above" as per the last option shown)