根据对患者人身造成的损害程度，医疗事故分为四级，二级医疗事故是指（）

A.造成患者轻度残疾、器官组织损伤导致一般功能障碍

B.抢救重危患者生命而采取紧急医疗措施造成不良后果

C.造成患者死亡、重度残疾

D.造成患者明显人身损害的其他后果

E.造成患者中度残疾、器官组织损伤导致严重功能障碍

An analyst does research on the reclassification of non-current assets. A company reclassifies a non-current asset from held-for-use to held-for-sale. At that time, the asset's carrying value is greater than its fair value less costs to sell, and the company most likely recognizes:（）

A. a gain.

B. a loss.

C. neither a loss nor a gain.