In Prolog, which of the following pairs will successfully unify?

Multiple answers possible. Negative partial points taken for incorrect selections.

A$.$

'Barbara' $=$ barbara.

B$.$

career$($programmer$)=$career$($Z$).$

C$.$

career$($programmer$)=$Z$.$

D$.$

fiction$($dragon$,$ X$,$ unicorn$)=$ fiction$($Y$,$ batman, X$).$

E$.$

programmer$=$coder.

F$.$

programmer$=$Analyst.