上、中、下三个鼻甲各来源于（）。

A.上鼻甲为筛骨，中、下鼻甲为蝶骨

B.中鼻甲为上颌骨，上、下鼻甲为筛骨

C.上、中鼻甲为筛骨，下鼻甲为独立骨片

D.均来源于筛骨

E.均来源于鼻骨

You throw food away because it doesn’t suit your taste and __________ children in some disadvantaged areas are starving. [ ]

A. therefore

B. consequently

C. meanwhile

D. moreover