Why is the type Char?

Why is the type of employees[0].position[5] a char instead of a string? I got this wrong on a test, and I can't figure out why... Appreciate your help.

struct Name
    {
    string firstName;
    char middleInitial;
    string lastName;
    };
    class EmployeeInfo
    {
    Name name;
    int age;
    int id;
    string position;
    public:
    Name getName() { return name; }
    };
    EmployeeInfo employees[100];