Insourcing should be considered when: Select one: O a. assurance of supply is a problem, the supplier has developed a unique process to produce the product or service and there is an opportunity to reduce costs significantly. O b. there is an opportunity to reduce costs significantly O O O c. assurance of supply is a problem. d. the supplier has developed a unique process to produce the product or service. e. assurance of supply is a problem and there is an opportunity to reduce costs significantly