(45)Resolution tools should be designed and suitable to counter a broad set of largely unpredictable scenarios, taking into account that there could be a difference between a single insurance or reinsurance undertaking in crisis and a broader systemic crisis. Resolution tools should therefore cover each of those scenarios, including the solvent run-off of the undertaking under resolution until its termination, the sale of the business or shares of the undertaking under resolution, the setting up of a bridge undertaking, the separation of assets and liabilities from the impaired or under-performing portfolios of the failing undertaking, and the write-down or conversion of capital instruments and other eligible liabilities of the failing insurance or reinsurance undertaking.