[正答]
C
※国試ナビ4※ [109I020]←[国試_109]→[109I022]
[★]
D
※国試ナビ4※ [109I021]←[国試_109]→[109I023]
B
※国試ナビ4※ [109I019]←[国試_109]→[109I021]
.