【单选题】
A <{p}>Obtain an enterprise CA-signed certificate for the Forward Trust certificate<{br/}><{/p}>
B <{p}>Obtain a certificate from a publicly trusted root CA for the Forward Trust certificate<{br/}><{/p}>
C <{p}>Use an enterprise CA-signed certificate for the Forward Untrust certificate<{br/}><{/p}>
D <{p}>Use the same Forward Trust certificate on all firewalls in the network<{br/}><{/p}>
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