Who Determines When the Loan Associated with a Bond Becomes

Who determines when the loan associated with a bond becomes due?

A) the bondholder,by declaring a desire to collect on the loan
B) anyone who sells or resells the bond,by assigning a maturity date at the time of sale
C) anyone who buys the bond,by assigning a maturity date at the time of purchase
D) the bond issuer,by assigning a maturity date when the bond is issued
E) the bond issuer,by declaring a desire to repay the loan