you need to create a relationship between the transactions table and the customers table. to do this, what foreign key must be added to the transactions table? a. activity id b. item id c. customer id d. transaction date when you create the relationship from the customers table to the transactions table, what type of relationship should you configure? a. one-to-one b. many-to-one c. many-to-many d. one-to-many after entering data into a relational database, users can make inquiries, analyze the data, and organize the data.