Consider a Class That Uses the Following Variables to Implement

Multiple Choice

Consider a class that uses the following variables to implement an array-based stack:
String [ ] s = new String[100];
Int top = -1;// Note top == -1 indicates stack is empty
A method that implements a String peek() operation can be written as

A) if (top == -1)
Throw new RuntimeException("Empty Stack") ;
Else
Return s[top -1];
B) if (top > -1.
Return s[top];
Else
Throw new RuntimeException("Empty Stack".;
C) top --;
If (top == -1.
Throw new RuntimeException("Empty Stack".;
Else
Return s[top];
D) if (top == 0.
Throw new RuntimeException("Empty Stack".;
Else
{
Top --;
Return s[top];
}