A line process contains four work stations, A, B, C and D. Work travels in batches through these four stations, first through A, then through B, then C and finally D. The average production rate for each station is as follows: Station A: 6,000 Station B: 3,400 Station C: 4,150 Station D: 2,200 Before which station or stations would you expect work-in-process (WIP) inventory to build up if all stations are working at maximum capacity? Before Stations B and D a. O b. Before Station B only Before Station Conly d. Before Station Donly