[正答]
D
※国試ナビ4※ [107I019]←[国試_107]→[107I021]
[★]
B
※国試ナビ4※ [107I020]←[国試_107]→[107I022]
※国試ナビ4※ [107I018]←[国試_107]→[107I020]
.