Hexamethylene diammonium adipate is
A. `H_(3)N- (CH_(2))_(6) - NH_(3) OOC(CH_(2))_(4) COO`
B. `H_(3) N^(+) - (CH_(2))_(6) - NH_(3) ""^(+) OOC (CH_(2))_(4) - COOH`
C. `H_(3) N^(+) - (CH_(2))_(6) - N^(+) H_(3)COO ^(-) - (CH_(2))_(4) COO^(-)`
D. `H_(3)N- (CH_(2))_(6) - NH_(3) COO^(-) - (CH_(2))_(4) COO^(-)`
