What is the result?

Given the code fragment:
Map<Integer, String> books = new TreeMap<>();
books.put (1007, “A”);
books.put (1002, “C”);
books.put (1001, “B”);
books.put (1003, “B”);
System.out.println (books);
What is the result?

A.
{1007 = A, 1002 = C, 1001 = B, 1003 = B}

B.
{1001 = B, 1002 = C, 1003 = B, 1007 = A}

C.
{1002 = C, 1003 = B, 1007 = A}

D.
{1007 = A, 1001 = B, 1003 = B, 1002 = C}