Identify the issue in this Angular template snippet:
<div [ngSwitch]="value">
<div *ngSwitchCase="1">One</div>
<div *ngSwitchCase="2">Two</div>
<div *ngSwitchCase="3">Three</div>
<div *ngSwitchCase>Default</div>
</div>
AThe *ngSwitchCase values must be strings, so numbers are invalid.
BThe last *ngSwitchCase is missing a value and should be *ngSwitchDefault instead.
CThe [ngSwitch] directive should be written as *ngSwitch instead.
DThe *ngSwitchCase directives must be placed on the parent div, not child divs.
