Organ

What Is The Difference Between A Tissue And An Organ System?
A. An Organ System Includes Tissues.
B. Tissues Are Not Considered To Be Living; Organ Systems Are Considered To Be Living.
C. The Tissue Level Of Organization Is More Inclusive Than The Organ System Level.
D. A Tissue Cannot Exist Unless It Is A Component Of An Organ System, Whereas An Organ System Can Exist Independently Of Tissues.
E. Tissues Are Not Composed Of Cells; Organ Systems Are Composed Of Cell.

I Think Its D, But I'm Not Sure. Please Help, This Is A Study Guide For An Exam And We Are Not Going Over The Answers.