Endorsement means that:

$A$: $if$ the acceptor $is$ unable $to$ pay the face value $on$ the maturity date, then $itis$ obliged $to$ draw a bill $to$ meet its initial obligations.

$B$: $an$ agreement between the acceptor and $an$ endorser $is$ reached, whereby the acceptor $is$ obliged $to$ pay the face value $on$ the maturity date $if$ the endorser $is$ unable $to$ pay the subsequent holder $of$ the bill.

$C$: the endorser has a contingent liability only until the bill matures.

$D$: None $of$ the above.