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: Microbiology
Multiple drug resistance of bacteria depends on which of the following: 
Select and explain. 
A. Resistance transfer factor (RTF), B. Colicigenic factor (Col), C. Fertility factor (F +), D. All of the above
A: Resistance transfer factor (RTF)
Answer: A: Resistance transfer factor (RTF) 
Explanation: None