When troubleshooting client DNS issues, which two tasks must you perform?

When troubleshooting client DNS issues, which two tasks must you perform? (Choose two.)
A. Ping a public website IP address.
B. Ping the DNS server.
C. Determine whether the hardware address is correct.
D. Determine whether a DHCP address has been assigned.
E. Determine whether the name servers have been configured.

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