Which of the following statements are true?

Question 28 options:

A)	If a file (e.g., c:\temp.txt) does not exist, new File("c:\\temp.txt") returns null.

B)	If a directory (e.g., c:\liang) does not exist, new File("c:\liang") returns null.

C)	If a directory (e.g., c:\liang) does not exist, new File("c:\liang") creates a new directory named c:\liang.

D)	If a file (e.g., c:\temp.txt) does not exist, new File("c:\\temp.txt") creates a new file named c:\temp.txt.

E)

None of the above.

Question 30 (2 points)

A subclass of a non-abstract class must be non-abstract.

Question 30 options:

A)

true

B)

false