Consider a class that uses the following variables to implement an array-based stack:

Question

```
String[] s = new String[100];
int top = 0;

```

a method for adding an item x to the stack can be written as
A) s.add(top, x);

B)
if (top == s.length)
throw new RuntimeException("Overflow");
else
{
top++;
s[top] = x;
}

C)
if (top < 0) throw new IndexOutBoundsException()
s[top] = x;
top++;

D)
if (top < s.length)
{
s[top] = x;
top++;
}
else
throw new RuntimeException("Overflow");

Answer 1

D)
if (top < s.length)
{
s[top] = x;
top++;
}
else
throw new RuntimeException("Overflow");