Q. Fault-tolerant architectures is

• (A) The software and hardware system architectures that provide explicit support for tolerance, which includes software redundancy and fault- tolerance controller that detects problems and supports fault recovery*
• (B) It is an initial step for requirements engineering process, includes the outline description of system, its use in an organization and recommending the system feasibility.
• (C) Trustworthiness with which a system or component can be modified for use in applications or environments other than those for which it was specifically designed.
• (D) None of these