Observe the table ENROLLMENT:

ENROLLMENT

$\backslash$

table

$[[$

StudentID

$,$

StudentName,ClassID,ClassName

$]$

$,$

$[111$

$,$

Joe,E

$1$

$,$

English

$1]$

$,$

$[222$

$,$

Bob,E

$1$

$,$

English

$1]$

$,$

$[333$

$,$

Lisa,H

$1$

$,$

History

$1]]$

Which of the following

$($

regarding the relation ENROLLMENT

$)$

$$represents the deletion

anomaly?