Given the following class:

And given the following main method, located in another class:

Which three lines, when inserted independently at line n1, cause the program to print a 0 balance?

• A.amount = 0;
• B.acct.changeAmount(0);
• C.this.amount = 0;
• D.acct.amount = 0;
• E.acct (0) ;
• F.acct. getAmount () = 0;
• G.acct.changeAmount(-acct.getAmount());
• H.acct.changeAmount(-acct.amount);

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Given:

Which code fragment, when inserted at line 9, enables the code to print true?

• A.String str2 = new string (str1);
• B.String str2 = str1;
• C.String str2 = "Duke";
• D.String str2 = sb1.toString();

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Which two statements are true for a two-dimensional array?

• A.It is implemented as an array of the specified element type.
• B.All methods of the class Object may be invoked on the two-dimensional array.
• C.Using a row by column convention, each row of a two-dimensional array must be of the same size.
• D.At declaration time, the number of elements of the array in each dimension must be specified.

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