What is the most likely reason for a person to have abnormally high blood urea levels?

Question

Quizplus · Accepted Answer

Abnormally high blood urea levels indicate kidney dysfunction, as the kidneys are responsible for filtering and removing urea from the body. Liver dysfunction (A) would lead to abnormal levels of other substances, such as bilirubin and liver enzymes. Rapid weight gain (C) may indicate fluid retention, but not necessarily high blood urea levels. Protein intake one-tenth the RDA (D) may lead to a deficiency in essential amino acids, but not necessarily high blood urea levels. Hyperstimulation of the immune system (E) may lead to inflammation and immune-related disorders, but not necessarily high blood urea levels.

What Is the Most Likely Reason for a Person to Have