[正答]
C
※国試ナビ4※ [110I018]←[国試_110]→[110I020]
[★]
A
※国試ナビ4※ [110I019]←[国試_110]→[110I021]
D
※国試ナビ4※ [110I017]←[国試_110]→[110I019]
.