Fix participants-content-view

src/app/components/participant/content-choice-participant/content-choice-participant.component.html

 <form (ngSubmit)="submitAnswer()">
-  <h1 class="mat-headline">{{ content.subject }}</h1>
+  <h1 class="mat-headline">{{ content.body }}</h1>
   <mat-divider></mat-divider>
   <mat-list *ngIf="content.multiple">
     <mat-list-item *ngFor="let answer of checkedAnswers">

src/app/components/participant/content-choice-participant/content-choice-participant.component.scss

@@ -8,4 +8,5 @@ form > div > mat-chip-list {
 
 form > h1 {
   margin:20px 0;
+  font-size: larger;
 }