Which option is the proper syntax of the nslookup command in the Cisco ESA CLIto list mail exchangers for domain “cisco.com”?

Which option is the proper syntax of the nslookup command in the Cisco ESA CLIto list mail exchangers for domain “cisco.com”?
A. nslookup -d cisco.com -t mx
B. nslookup mx cisco.com
C. nslookup -type=mx cisco.com
D. nslookup cisco.com mx