Sarah consumes two commodities - clothes and food. Suppose the price of clothes suddenly increases. We want to decompose the effect of this price change into substitution effect (SE) and income effect (IE). Which of the following is true? a. SE increases Sarah's food consumption. O b. SE decreases Sarah's food consumption. O c. SE does not change Sarah's food consumption. O d. The change in Sarah's food consumption due to the SE is ambiguous