[正答]
D
※国試ナビ4※ [105B018]←[国試_105]→[105B020]
[★]
B
※国試ナビ4※ [105B017]←[国試_105]→[105B019]
A
※国試ナビ4※ [105B019]←[国試_105]→[105B021]
.