what command is used?

To open a Port on a Host’s Firewall, what command is used?

A.
esxcfg-firewall -o

B.
esxcfg-firewall -d

C.
esxcfg-firewall -q

D.
esxcfg-firewall -e

Explanation:
Open a port:
esxcfg-firewall -o 465,tcp,out,out-smtps