Which of the Following Cannot File a Bankruptcy Petition Under

Which of the following cannot file a bankruptcy petition under the Code?

A) Aztec, a foreign corporation doing business in the United States.
B) Milan, a citizen of Bosnia, who owns property in the United States.
C) Debra, a resident of Michigan, whose liabilities do not exceed assets.
D) Stan, an American citizen, who refuses to undergo credit counseling.
E) All of the above.