When setting up a site-to-site VPN with PSK authentication on a Cisco router, which two elements must be configured under crypto map? (Choose two.)

When setting up a site-to-site VPN with PSK authentication on a Cisco router, which two elements must be configured under crypto map? (Choose two.)
A . nat
B . transform-set
C . reverse-route
D . peer
E . pfs

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Answer: BD