A chain bridle is preferable to a wire rope towing bridle on a long ocean tow because chain（）.

A.is more flexible and has the ability to absorb shock because of its weight

B.is less subject to wear and damage from abrasion

C.requires little maintenance

D.All of the above

提任副县(处)级以上领导职务的，由副职提任正职，一般要在副职岗位上工作3年以上。 ( )