A project requires $10$ weeks to complete with a cost of $$5$ per week. All paths expect the critical path can be finished in $7$ weeks. Crashing cost is non$-$linear and is defined as $$(3+$x$)$ per week where x is the number of weeks from the maximum to be crashed with x $>0.$ For example, the crashing cost for the $1$st week will be $$(3+1)$ while that for the $2$nd week will be $$(3+2)$ with the total cost for crashing for two weeks being the sum of the two.

We are indifferent between crashing it for one or two weeks

We should not crash.

None of the above

We should crash it for two weeks