Answer: C). He has not ruled out rival explanations.
Explanation:
A claim is a statement which is either based on some observation or evidences obtain from the experimental trials. Walter made a false claim as he didn't new the fact that the new car has more fuel efficiency so as the fuel retained the same amount as it was in the initially present in the car. Actually he has not ruled out the rival explanations and he cannot be considered as better driver.
Food/supplies or valuables hope this helps
H.E.L.P. This position, the Heat Escape Lessening Position, or H.E.L.P., aims to protect some of the areas of your body most prone to heat loss - the head, neck, sides of the chest cavity and the groin area. If you are wearing a life jacket, this position can be very effective.