Final answer:
The small potato contains 0 grams of protein.
Step-by-step explanation:
In order to determine the grams of protein in a small potato, we need to use the information given. We are told that the potato has a total of 86.0 calories and contains 20.0 grams of carbohydrates and no fat.
From the given information, we know that carbohydrates provide 4 calories per gram. So, the calories from carbohydrates in the potato can be calculated as: 20.0 grams x 4 calories/gram = 80 calories.
Since the total calories in the potato is 86.0, and we know that carbohydrates contribute 80 calories, the remaining calories must come from protein. Therefore, the grams of protein in the potato can be calculated as: (86.0 calories - 80 calories) / 4 calories/gram = 1 gram.
Thus, the correct answer is a. 0 grams.