What is the cause for this error?

During installation of Oracle VM Manager to a new Oracle Enterprise Linux server, the

installer fails with a message indicating that there is insufficient swap space. What is the
cause for this error?

A.
The installer has determined that the Oracle application server’s (OC4J) minimum
requirement for swap space has not been met.

B.
The installer has determined that the Oracle application server’s (OC4J) minimum
requirement for swap space has not been met.

C.
The installer has determined that there is insufficient swap space to unpack the
installer into the /var subdirectory.

D.
The installer has determined that the swap space recognized by the system has
been incorrectly formatted to use TMPFS instead of SWAPFS.