What does discharge confirm under the FIDIC Red Book (edition 1999)?

Discharge under FIDIC Red Book 1999 confirms full and final settlement of all money due to the Contractor. It signifies the Contractor's acceptance of the Final Payment Certificate and releases the Employer from further financial obligations related to the contract.

Options A and C misrepresent the nature of discharge.

Discharge is not a unilateral immediate termination but a financial closure.