Suppose the net energy value of a food item is 30 kcal. The time invested in obtaining each food item is 22 s, and the time invested in processing each food item is 3 s. What is the profitability of this food source?
A) 0.83 kcal/s B) 1.2 kcal/s C) 1.4 kcal/s D) 10 kcal/s