When using the critical ratio$($CR$)$ to develop a$$ sequence,

Part $2$

A$.$

a CR of $1\mathrm{.}0$ means that the job must be scheduled last.

B$.$

a CR greater than $1\mathrm{.}0$ means that the job has some slack.

C$.$

a CR less than $1\mathrm{.}0$ means that the job is ahead of schedule.

D$.$

a CR of $1\mathrm{.}0$ means that the job must be scheduled first.