Given the Following Strucure Definitions, What Is the Correct Way

Given the following strucure definitions, what is the correct way to print the person's birth year?
Struct DateType
{
Int day;
Int month;
Int year;
}
Struct PersonType
{
Int age;
Float weight;
DateType birthday;
}
PersonType person;

A) cout << person.birthday.year;
B) cout << year;
C) cout << birthday.year;
D) cout << peson.year;