which statement is correct?

You have a group IPsec VPN established with a single key server and five client devices.
Regarding this scenario, which statement is correct?

A.
There is one unique Phase 1 security association and five unique Phase 2 security associations
used for this group.

B.
There is one unique Phase 1 security association and one unique Phase 2 security association
used for this group.

C.
There are five unique Phase 1 security associations and five unique Phase 2 security
associations used for this group.

D.
There are five unique Phase 1 security associations and one unique Phase 2 security
association used for this group.

Explanation:

Reference :http://www.thomaskrenn.com/redx/tools/mb_download.php/mid.x6d7672335147784949386f3d/Manual_Configuring_
Group_VPN_Juniper_SRX.pdf