Critical Path Net Work helps an engineer_________________?

Critical Path Net Work helps an engineer_________________?

A. to concentrate his attention on critical activities
B. to divert the resources from non-critical advanced activities to critical activities
C. to be cautious for avoiding any delay in the critical activities to avoid delay of the whole project
D. all of the above
E. none of the above

If E is the duration, ES and EF are die earliest start and finish times, LS and LF are latest start and finish times, then the following relation holds good______________________?

If E is the duration, ES and EF are die earliest start and finish times, LS and LF are latest start and finish times, then the following relation holds good______________________?

A. EF=ES+D
B. LS=LF-D
C. LF = LS + D
D. D = EF-ES
E. all of the above