Consider a sequential process with $3$ stations. The processing time $($minutes per unit$)$ and number of employees at each station are as follows:

$\backslash$table$[[,$Processing time$/$unit$,$Number of Employees$],[$Station A:$,4$ minutes,$1$ employee$],[$Station B:$,2$ minutes,$2$ employees$],[$Station C:$,5$ minutes,$1$ employee$]]$

Where is the bottleneck?

Station C

Station B

Station A and B

Station B and C

Station A