[正答]
C
※国試ナビ4※ [100B020]←[国試_100]→[100B022]
[★]
D
※国試ナビ4※ [100B021]←[国試_100]→[100B023]
B
※国試ナビ4※ [100B019]←[国試_100]→[100B021]
.