[正答]
A
※国試ナビ4※ [105B019]←[国試_105]→[105B021]
[★]
D
※国試ナビ4※ [105B018]←[国試_105]→[105B020]
※国試ナビ4※ [105B020]←[国試_105]→[105B022]
.