A. Baby food cannot provide the required nutrients to babies without a food supplement such as one discussed in the argument.
This is irrelevant. The argument is about adding this specific supplement to all foods, not about whether any supplement is necessary for baby food in general.
Eliminate.
B. Food supplement companies rarely accept that their supplements may not work with certain types of food.
This focuses on the behavior of supplement companies, not on the effectiveness or necessity of adding this supplement to baby food.
Eliminate.
C. Irrespective of the type of baby food it is mixed with, the food supplement has no side effect.
While this might remove concerns about potential harm, it does not explain why the supplement should be added to food types where it does not enhance nutritional value.
Eliminate.
D. The food supplement is organic in nature and cannot be used with adult food.
The organic nature of the supplement and its usability with adult food are irrelevant to justifying its addition to all types of baby food.
Eliminate.
E. When the supplement does not enhance the nutritional value derived by the babies from a food the supplement is mixed with, it still acts as a digestive.
This directly strengthens the argument. It explains why the supplement should be added to all baby foods: even when it doesn’t enhance nutritional value, it provides a separate benefit (improved digestion).
Correct Answer.
Final Answer: E.