What did the following commands determine?

C : user2sid earth guest

S-1-5-21-343818398-789336058-1343024091-501

C:sid2user 5 21 343818398 789336058 1343024091 500

Name is Joe

Domain is EARTH

A.
That the Joe account has a SID of 500

B.
These commands demonstrate that the guest account has NOT been disabled

C.
These commands demonstrate that the guest account has been disabled

D.
That the true administrator is Joe

E.
Issued alone, these commands prove nothing

Explanation:
One important goal of enumeration is to determine who the true administrator is. In the example above, the true administrator is Joe.