Guerrilla warfare is basically 'Hit and Run' with a more sophisticated name. I'm not sure about why it was so successful in Vietnam, but I do know that Guerrilla warfare is very effective when executed properly, because there are very few casualties and a lot of damage is done to the enemy. It also works really well when the people using guerrilla warfare know the terrain well, because they would have an advantage over the enemy.
Hope this helps!
The most common transportation around Honduras would be Buses ( A.K.A. Chicken buses.) They're called chicken buses because they're old and worn out.
The real answer is D. The purpose was the march due to British rule in India.