Assume, that a relational table EMPLOYEE contains a column project_name with the names of the projects, the employees are working on. A column project_name is a foreign key referencing a primary key project_name in a relational table PROJECT. The foreign key has no clause ON DELETE CASCADE attached. What is a correct order of deleting the project specifications from a relational table PROJECT ? a. Delete the project first and delete employees working on a deleted project next b. It is impossible to implement such deletion because ON DELETE CASCADE clause is not attached to a foreign key c. Delete all employees working in the project first and then delete the project d. Delete a project and the employees working on the project will be deleted automatically