[正答]
C
※国試ナビ4※ [098G019]←[国試_098]→[098G021]
[★]
D
※国試ナビ4※ [098G018]←[国試_098]→[098G020]
※国試ナビ4※ [098G020]←[国試_098]→[098G022]
.