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 = 0;
The boolean method to check for an empty stack can be written as:

A) return top;
B) if (top == 0.
Return true;
Else
Return false;
C) if (s == null.
Return true;
Else
Return false;
D) if
Return true;
Else
Return false;