Which of the following is/are the characteristics of RAID architecture.
i) RAID is set of physical disk drives viewed by the operating system as a single logical drive
ii) Data are distributed across the physical drives of an array
iii) It is used to store parity information, which guarantees data recoverability in case of disk failure.
a. i and ii only
b. ii and iii only
c. i, ii and iii
d. i and iii only