What Is the Most Likely Explanation for the Impaired Functioning

What is the most likely explanation for the impaired functioning of the GI tract resulting from folate deficiency? ​

A) insufficient bile production, thereby promoting fat malabsorption and diarrhea
B) reduced mucosal cell replacement, thereby resulting in decreased GI functioning
C) decreased enzymatic capacity in the intestines, thereby resulting in malabsorption
D) decreased oxygen supply to body tissues, with the intestines being particularly affected because of their high metabolic activity