$22)$ Consider the Set Abstract Data Type. Which of the following operations should NOT be provided?: $*$A$)$ belongsTo $($Set a$,$ Element e$)$

B$)$ add $($Set a$,$ Element e$)$

C$)$union $($Set a$,$ Set b$)$

D$)$ size $($Set a$)$

E$)$ define $($Set a$,$ Key k$,$ Definition d$)$