Based on above information, which resource is the bottleneck? The clinic is planning to hire $2$

additional units for the bottleneck resource. After the new fires, what's the system bottleneck?

a$.$ Dermatology; Diabetes

b$.$ Diabetes; Dermatology

c$.$ Primary care; Diabetes

d$.$ Primary care; Nurse

e$.$ Dermatology; Primary care

f$.$ Primary care; Primary care