Question du test Angular

const routes:Routes = [
  {
    path: 'items',
    loadChildren: () => import('./items/items.module').then(m => m.ItemsModule)
  }
];

const routes:Routes = [
  {
    path: 'items',
    loadChildren: () => import('./items/items.module')
  }
];

const routes:Routes = [
  {
    path: 'items',
    loadChildren: import('./items/items.module')
  }
];

const routes:Routes = [
  {
    path: 'items',
    loadChildren: import('./items/items.module').then(m => m.ItemsModule)
  }
];