The WBS, estimates for each work package, and the network diagram are completed. Which of the following would be the NEXT thing for the project manager to do

A) Sequence the activities.
B) Verify that they have the correct scope.
C) Create a preliminary schedule and get the team's approval.
D) Complete risk management.

使用液压千斤顶，顶升或下落时应采取哪些安全措施？