Systemic tissue damage is one of the most serious consequences of Disease X, though systemic tissue damage itself is only a symptom of Disease X and not a disease itself. Systemic tissue damage occurs only when, in an attempt to defend itself against Disease X, the body produces antibodies that intend to combat the virus. In trying to expunge the virus, the antibodies attack organ tissue and damage it permanently.
Which of the following, if true, would contribute most to an explanation of why Disease X is one of the few medical conditions that can give rise to systemic tissue damage?
A. Only certain kinds of systemic tissue damage are associated with Disease X.
B. The antibodies that the body creates to defend itself against Disease X can also damage the bone marrow.
C. Antibiotics have not proved as potent against Disease X as they have against some other viral infections.
D. Disease X is the only disease whose virus disguises itself invisibly in healthy tissue.
E. Systemic tissue damage can be mistreated if it is not linked to Disease X.