C. The sensitivity of the retina decreases
Answer:
Dry Mouth (Xerostomia)
Fungal Infection.
Gum Swelling (Gingival Overgrowth)
Inflammation of the Lining Inside of the Mouth (Mucositis)
Mouth Sores (Ulcers)
Taste Changes, Including Metallic Taste.
Tooth Decay.
Tooth Discoloration.
If want a direct answer it would be the decrease in mice, but if you want to get technical the decrease in grain spills caused mice to leave so that would be the indirect cause