Which of the following is the proper way to access the frame "second" from the script of an outside document?

Consider the following HTML document.
```









```
a.
```
document.frames( "second")
```
b.
```
document.frames( second )
```
c.
```
parent.frame( "second" )
```
d.
```
parent.frames( " second" )
```

d.
```
parent.frames( " second" )
```