What Was a Major Issue in DeCODE's Genomic Studies of Icelanders

What was a major issue in deCODE's genomic studies of Icelanders that ultimately led to it filing for bankruptcy?

A) Too many Icelanders were reluctant to cooperate with deCODE.
B) deCODE did not have the money to invest in the high-tech equipment needed.
C) Most diseases are are caused by multiple gene mutations and are therefore too complex for deCODE's purposes.
D) There was too much criticism from bioethicists, especially from the United Nations.
E) Several top executives at deCODE were charged with embezzlement.