[正答]
B
※国試ナビ4※ [104I019]←[国試_104]→[104I021]
[★]
AB
※国試ナビ4※ [104I018]←[国試_104]→[104I020]
E
※国試ナビ4※ [104I020]←[国試_104]→[104I022]
.