Day's Nail Salon has two technicians available to paint customer's nails. Both technicians provide a similar experience and skill, but technician 2 is just a little bit slower than the other. The process flow below shows that all customers go through steps A and B and then can be served at either of the two technicians at step C. The process ends after step D. The numbers in parentheses indicate the minutes it takes that activity to process a customer. nail salaon process flow.png Which step is the bottleneck for this process? Group of answer choices A B D C