[正答]
C
※国試ナビ4※ [105I050]←[国試_105]→[105I052]
[★]
D
※国試ナビ4※ [105I051]←[国試_105]→[105I053]
※国試ナビ4※ [105I049]←[国試_105]→[105I051]
.