What is the output of the second command?

Consider the following commands on a newly installed system:
zfs set compression=on rpool
zfs get –H –o source compression rpool
What is the output of the second command?

A.
default

B.
–

C.
local

D.
on

Explanation:
The zfs get command supports the -H and -o options, which are designed for
scripting. You can use the -H option to omit header information and to replace white space with
the Tab character. Uniform white space allows for easily parseable data. You can use the -o
option to customize the output in the following ways:
* The literal name can be used with a comma-separated list of properties as defined in the
Introducing ZFS Properties section.
* A comma-separated list of literal fields, name, value, property, and source, to be output followed
by a space and an argument, which is a comma-separated list of properties.

The following example shows how to retrieve a single value by using the -H and -o options of zfs
get:
# zfs get -H -o value compression tank/home
on