Tugs sometimes shackle a length of chain in the towline in order to（）.

A.take the wear should the towline drag bottom

B.assure that if the towline is overstressed it will part close to the bridle

C.prevent the towline from whipping should it part

D.put spring in the towline

关于T-OA高级流程设置，以下说法正确的是（）。

A.在高级流程设置中，回复节点实质上是个条件判断节点

B.有分支节点，一定要有聚合节

C.有分支节点，可以没有聚合节点

D.有并行节点，可以没有合并节点