A production process consists of five steps. The maximum speed of each step is as follow: Step 12 units per 1 hour Step 8 units per 2 hour Step 9 units per 3 hour Step 6 units per 4 hour Step 7 units per 5 hour If the processing speed of Step 4 can be increased from 6 units per hour to 9 units per hour, the capacity utilization of Step 1 will increase from A) 50% to 58% B) 50% to 67% C) 50% to 75% D) The capacity utilization of Step 1 will remain unchanged