You have been asked to ensure that in-transit communication between an Oracle Cloud Infrastructure (OCI) compute instance and an on-premises server (192.168.10.10/32) is encrypted. The instances communicate using HTTP. The OCI Virtual Cloud Network (VCN) is connected to the on-premises network by two separate connections: a Dynamic IPsec VPN tunnel and a FastConnect virtual circuit. No static configuration has been added. What solution should you recommend? (Choose the best answer.) 

Answer options:

A. The instances will communicate by default over IPsec VPN, which ensures data is encrypted in-transit.
B. Advertise a 192.168.10.10/32 route over the VPN.
C. Advertise a 192.168.10.10/32 router over the FastConnect.
D. The instances will communicate by default over the FastConnect private virtual circuit, which ensures data is encrypted in-transit.

D

Reference: https://docs.oracle.com/en-us/iaas/Content/Network/Tasks/transitrouting.htm