Which of the following JavaScript statements contain variables whose values are destroyed (changed or replaced)?
a)
```
p = i + j + k + 7;
```
b)
```
window.alert( "variables whose values are destroyed" );
```
c)
```
window.alert( "a = 5" );
```
d)
```
stringVal = window.prompt( "Enter string:" );
```
a)
```
p = i + j + k + 7;
```
and
d)
```
stringVal = window.prompt( "Enter string:" );
```
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