Which one of the following describes the difference between the usage of BUFSIZE= and BUFNO= options?

The following SAS program is submitted:

data new (bufsize = 6144 bufno = 4);

set old;

run;

Which one of the following describes the difference between the usage of BUFSIZE= and BUFNO= options?
A . BUFSIZE= specifies the size of the input buffer in bytes; BUFNO= specifies the number of input buffers.
B . BUFSIZE= specifies the size of the output buffer in bytes; BUFNO= specifies the number of output buffers.
C . BUFSIZE= specifies the size of the output buffer in kilobytes; BUFNO= specifies the number of input buffers.
D . BUFSIZE= specifies the size of the output buffer in kilobytes; BUFNO= specifies the number of output buffers.

Answer: B