The most likely time for oil pollution while bunkering is when（）.

A.final topping off is occurring

B.first starting to receive fuel

C.hoses are being blown down

D.hoses are disconnected and being capped

唐朝时，富商王元宝、杨崇义、郭万金等“各以延纳四方多士，竞于供送，朝之名僚，往往出于门下。每科场文士集于数家，时人目之为豪友”。这表明唐代（）

A.废止了重农抑商的经济政策

B.商人的社会地位有所提高

C.政府注重调动商人的积极性

D.开始形成官商勾结的风气