Company.org has requested a black-box security assessment be performed on key cyber terrain. One area of concern is the company`s SMTP services. The security assessor wants to run reconnaissance before taking any additional action and wishes to determine which SMTP server is Internet-facing. Which of the following commands should the assessor use to determine this information? 

Answer options:

A. dnsrecon "d company.org "t SOA
B. dig company.org mx
C. nc "v company.org
D. whois company.org

A