21. In the relational database model, a primary key may have multiple candidates, in each candidate is called a candidate key A. True B. False multiple candidates, in which case outsourcing (or onshoring), the client outsources a project to a vendor residing in the same country A. True B. False 23. Among the four ERP implementation approaches, the Pilot Implementation approach is the riskiest. A. True B. False 24. The Hawthorne effect might happen during the Analysis phase of SDLC. A. True B. False 25. In the relational database model, the name of a foreign key must be the same as the name of its corresponding primary key A. True B. False 26. In the Hershey ERP implementation case that we have discussed in the class, the implementation approach initially planned by Hershey was parallel implementation, but Hershey later switched to direct implementation. A. True B. False 27. Which of the following is a key activity that happens at the Planning stage of SDLC? A. Identify and select system development projects and make high-level plans B. Gather business requirements of the system C. Assess the system development project's feasibility D. A+B E. A+C 28. Which of the following is NOT an example of a company following the differentiation strategy? A. Neiman Marcus B. Starbucks C. FedEx D. Dollar Tree E. C+D