What is displayed by the C++ statements that follow if the value input is 0?

```
cin >> color;
switch (color) {
case 0:
case 1:
cout << "red ";
case 2:
cout << "blue ";
case 3:
cout << "green ";
case 4:
cout << "yellow ";
}
cout << endl;
```

a. no output
b. red
c. yellow
d. red blue green yellow

d. red blue green yellow