How should you transport herbicide?

When transporting herbicide, it is important to maintain the safety of both the environment and any potential passengers. Option A, using a vehicle without other items, is not the best choice as the herbicide could potentially leak or spill and damage the vehicle and its contents. Option B, using thoroughly cleaned containers, may not entirely prevent contamination of other items in the vehicle. Option D, making sure there is proper ventilation, is important but not the most crucial factor when it comes to transporting herbicide. Option C, tying down and securing the herbicide away from any potential sources of contamination (such as food, animal feed, or animal supplies), is the best choice to ensure the safe transportation of herbicide.