Consider a process consisting of four steps $($A$,$ B$,$ C$,$ D$)$ that need to be performed in sequence $($i$.$e$.,$ A $$ B $$ C $$ D$).$The processing times and the number of employees assigned to each step are given below. $$Each worker can work on only one unit at any point in time.

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A$$B $$C $$D

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Processing Times $($min$/$unit$)1612206$

Number of Workers $2141$

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Which of the following changes decreases the minimum possible throughput time of this process?

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Removing one worker from Step A

Adding one worker to Step B

Moving on worker from Step C to Step B so that three workers are assigned to Step C and two workers are assgned to step B

None of the above