根尖脓肿最常见的排脓途径是（）

A.龋洞排脓

B.牙周袋排脓

C.腭侧牙龈排脓

D.唇颊侧牙龈排脓

E.上颌窦排脓

Hello, you ________ 86558225. I'm sorry, but I'm unable to answer your question right now.[ ]

A. reached              

B. were reaching        

C. have reached      

D. had reached