According to the Text, the Primary Issue Regarding the Blow-Up

According to the text, the primary issue regarding the blow-up of the British Petroleum (BP) oil derrick forty miles out to sea, at a depth of about one mile, in April 2010 is

A) BP because their emergency measures failed to work.
B) the U.S. government because it did not regulate the drilling tightly enough.
C) the special interest group(s) benefitting from forcing the drilling so far off shore and so deep.
D) both BP and the U.S. government
E) Who knows? They are still debating this.