In launching a lifeboat，when should the tricing pendants be released?（）.

A.Before the boat is lowered from the stowage position

B.As soon as the boat-fall blocks clear the davit head

C.After the limit switch is activated

D.After all people have been embarked

液压自动绞缆机在限制油压溢流阀达到开启压力后，其缆绳张力：（）

A.不会再增加

B.不会再改变

C.自动放缆时还会增加

D.自动收揽时还会增加