Which GGSCI command(s) show all available information on both read and write checkpoint for an Extract?

Which GGSCI command(s) show all available information on both read and write
checkpoint for an Extract?
Example: 1 INFO EXTRACT <group name>
Example: 2 INFO EXTRACT <group name>, DETAIL
Example: 3 INFO EXTRACT <group name>, SHOWCH

A.
Example 2 only

B.
Example 3 only

C.
Examples 1 and 3

D.
Examples 1 and 2

Explanation:
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