Write the resulting set using the listing method.
\{5,6,8\} \cup \{3,5,6\}
Select the correct choice below and, if necessary, fill in the answer box to complete your choice.
A. \{5,6,8\} \cup \{3,5,6\} = \{
\}
(Use a comma to separate answers as needed.)
B. \{5,6,8\} \cup \{3,5,6\} is the empty set.