Which statement about the initiation of parallel I/O is correct?

A.
For list prefetching, each list of data pages is divided into smaller lists according to extent
boundaries and assigned to different I/O servers.

B.
For read-ahead prefetching, each list of data pages is divided into smaller lists according to
extent boundaries and assigned to different I/O servers.

C.
For sequential prefetching, parallel I/O is initiated when the prefetch size is a multiple of the
extent size for a table space. Each prefetch request is divided into smaller requests and assigned
to different I/O servers.

D.
For sequential prefetching, parallel I/O is initiated when the extent size is a multiple of the
prefetch size for a table space. Each prefetch request is divided into smaller requests and
assigned to different I/O servers.

Explanation: