Consider the following program. What is the purpose of pw?

import java.io.FileWriter; import java.io.IOException; import java.io.PrintWriter; public class FileUtil { public void writeLinesToFile(String filename, String[] linesToWrite, boolean appendToFile) { PrintWriter pw = null; try { if (appendToFile) { //If the file already exists, start writing at the end of it. pw = new PrintWriter(new FileWriter(filename,true)); } else { pw = new PrintWriter(new FileWriter(filename)); //this is equal to: //pw = new PrintWriter(new FileWriter(filename, false)); } for (int i = 0; i < linesToWrite.length; i++) { pw.println(linesToWrite[i]); } pw.flush(); } catch (IOException e) { e.printStackTrace(); } finally { //Close the PrintWriter if (pw != null) pw.close(); } } public static void main(String[] args) { // } }

a) pw is an object of the PrintWriter class. It is used to handle data reading and writing for this program, specifically to read each line of a file and write those lines to the screen.

b) pw is an array that has as its data type a PrintWriter object. It is used to hold data that will ultimately be written to a file.

c) pw is an object of the PrintWriter class. It is used to handle file writing for this program, specifically to write each line of an array to a file.

d) pw is a method of the PrintWriter class. It is used to handle file reading and writing for this program, specifically to write each line from one file to another file.

a, b, c or d?