Dennis Wilson Is a 57-Year-Old Chemical Engineer Who Has Had

Dennis Wilson is a 57-year-old chemical engineer who has had type 1 diabetes since he was 12 years old. He spent 34 years working in oil refineries, and he is a smoker. He is 5'11" tall and weighs 160 pounds. Over the past several years, he has experienced a gradual decline in kidney function. His GFR has declined to 27 mL/min per 1.73 m2.
-Protein intake for Mr. Wilson should _____.​

A) ​be restricted due to slow disease progression
B) ​be increased due to PEM
C) ​be limited to plant protein foods
D) ​be limited to animal protein foods
E) ​remain the same until he begins to lose weight