This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Physiology
Steroid hormones are believed to enter target cells via: 
Select and explain. 
A. Facilitated diffusion, B. Carrier — mediated endocytosis, C. Cholesterol lined pores in the plasma membrane, D. Simple diffusion
D: Simple diffusion
Answer: D: Simple diffusion 
Explanation: None