The ________ key darkens the screen during a presentation

To link tables to tables in an external RDBMS, a manager would use a(n) ________

Fill in the blank(s) with correct word

Consider the following statements:struct studentType1  {  string name;  int ID;  double gpa;  };studentType1 student1, student2;struct studentType2  {  string name;  int ID;  double gpa; };studentType2 student3, student4;Which of the following statements is valid in C++?

A. student2 = student3; B. student1 = student4; C. student2.ID = ID; D. student1.ID = student3.ID;