【单选题】

完成步骤1到4，确保没有轴向负载施加在连杆上。

A、Finish stage 1 to 4 to ensure that no axial force is derived from the roD.
B、Do steps 1 thru 4 to make sure that no axial load is applied on the roD.
C、Procedures 1 to 4 are designed to check if the rod exerts axial forcE.