In What State Is XYZ Bank, a Federally Chartered Bank

In what state is XYZ Bank, a federally chartered bank, considered a citizen?

A) The bank is considered a citizen of any state in which it is located, meaning any state in which the bank has branches.
B) The bank is considered a citizen of the state in which it is located, meaning the state in which its main office, as specified in its articles of incorporation, is located.
C) The bank is considered a citizen only of Washington, D.C.
D) The bank is considered a citizen only of the state in which it does its largest volume of business.
E) The bank is considered a citizen of Washington, D.C. and also of the state in which it does its largest volume of business.