Cisco Exam Questions

Which one of these statements is correct in regards to Next Gen University IPsec tunnel between its

Scenario:
Next Gen University main campus is located in Santa Cruz. The University has recently establisheci various remote campuses offening -lerning services. The UnverIty is using IPec VPN connectivity between its main and remote campus Phoenix (PHX), Newadla (ND). Sacremento (SAC). As a recent addition to The IT/Networking team. You have beeni tasked to document the IPsec VPN configurations to the remote campuses using the Cisco Ruler and SDM utility.
Using the SDM output from VPN Tasks under the Configure tab, answer these questions
Cisco SDM 5.0:

Which one of these statements is correct in regards to Next Gen University IPsec tunnel between
its Santa Cruz main campus and its SAC remote campus?

A.
The SAC remote campus remote router is using dynamic IP address; therefore, the Santa  Cruz router is using a dynamic crypto map.

B.
Dead Peer Detection (DPD) is used to monitor the IPsec tunnel, so if there is no traffic traversing between the two sites, the IPsec tunnel will disconnect.

C.
Tunnel mode is used: therefore, a GRE tunnel interface will be configured.

D.
Only the ESP protocol is being used: AH is not being used.