When driving a loaded heavy truck through deeply rutted, muddy rural roads, how should the vehicle be navigated to avoid bogging down?

1. Follow existing vehicle wheel ruts steadily in a low gear, keep momentum constant, avoid sudden steering, and do not shift gears mid-track
2. Drive with one side wheels on the grass embankment and the other side in the deep mud at high speed
3. Stop the truck inside the deepest mud hole to inspect tire tread clogging
4. Accelerate aggressively in high gear and turn the steering wheel rapidly back and forth