(A) The Theory is well-established.
(B) The Theory has not yet been disproven.
(C) The Theory is a proven fact.
(D) The Theory is wrong.
(A) The Theory is well-established.
No. This statement is not wrong.
(B) The Theory has not yet been disproven.
No. Some might argue,
but most biologists would agree.
(C) The Theory is a proven fact. --- Yes.
No scientific theory is ever a proven fact.
(D) The Theory is wrong. --- No.
Any scientific theory can be wrong,
so the statement is possible.