You have recently kick started planning your new substation refurbishment project. Due to the presence of serious safety hazards in the project, you have included a number of preventive activities in your project schedule. The project activity list is now complete and you are now applying the logical relationships to the activities. At this stage you must be careful not to: Select the relationship with the highest impact Have closed loops relationships between activities Have FS relationships for the non-critical activities Have FF relationships for the critical activities