The boolean method to check for an empty stack can be written as:

Consider a class that uses the following variables to implement an array-based stack:
String [] s = new String[100];
int top = 0;

A) return top;

B)
if (top == 0)
return true;
else
return false;

C)
if (s == null)
return true;
else
return false;

D)
if (s.length == 0)
return true;
else
return false;

B)
if (top == 0)
return true;
else
return false;