You are allowed to carry-on item and one personal item on most flights, and they are both

You are allowed to carry-on item and one personal item on most flights, and they are both subject to size restriction.

A.航空公司规定旅客一律禁止随身携带液态物品，行李超重另行收费。

B.多数航班规定只能随身携带个人物品一件，超过部分要另行收费。

C.大多数航班 允许随身携带一件行李和一件个人物品，大小不受限制。

D.大多数航班允许携带一件手提行李和一件个人物品，尺寸都有限制。

请帮忙给出正确答案和分析，谢谢！