Consider two disk configurations C$1$ and C$2.$ In C$1,$ a disk A is mirrored by another disk A$\text{'}.$ Read operations can access either A or A$\text{'},$ while write operations need to modify both A and A$\text{'}.$ In particular, serial writes are performed in order to avoid simultaneous corruption of both mirrors, thus protecting against permanent data loss. In C$2,$ disk A is mirrored by two other disks A$\text{'}$ and A$\text{'}\text{'},$ for added protection. Read operations can access any of the three disks while write operations modify all three disks. However, for the sake of higher performance, the write operations are performed in parallel.

Let the average read operation on a disk take $5$ ms and the average write operation take $10$ ms$.$

Consider a sequence of I$/$O operations consisting of $90$ read operations and $10$ write operations. Estimate the expected time for processing this sequence of operations in the two configurations. Identify the TRUE statement below, based on the estimate.