2019 Reading Comprehension - Health and Microbiome

Which one of the following is the most logical, rational and crucial inference that can be derived from the above passage?

• If malnourished condition in children is caused by gut bacteria, it cannot be treated.
• The guts of malnourished babies should be inoculated with mature microbiomes.
• Babies of malnourished mothers should be fed with dairy milk fortified with sialylated oligosaccharides instead of mother's milk.
• Research on benign effects of gut bacteria on nutrition has policy implications.