NEED ANSWER ASAP. I’ll mark brainliest if correct Select the correct answer.

Which concept in 00P explains the relationship between the classes nation and president, where the class nation has-a (an) object of class president?

-aggregation
-association
-abstraction
-composition
-inheritance

Wich technology can a website use to allow you to listen to a concert live over the internet?

Consider the following statements: struct nametype{string first; string last; }; struct coursetype{string name; int callnum; int credits; char grade; }; struct studenttype{nametype name; double gpa; coursetype course; }; studenttype student; studenttype classlist[100]; coursetype course; nametype name; mark the following statements as valid or invalid. if a statement is invalid, explain why.a.) student.course.callnum = "csc230"; b.) cin > > student.name; c.) classlist[0] = name; d.) classlist[1].gpa = 3.45; e.) name = classlist[15].name; f.) student.name = name; g.) cout < < classlist[10] < < endl; h.) for (int j = 0; j < 100; j++)classlist[j].name = name; i.) classlist.course.credits = 3; j.) course = studenttype.course;

Facial expressions and gestures are examples of messages.