Which of the following method signatures are valid overrides of the hairy() method in the alpaca class?
01 import java.uti1.";
02: public class Alpaca \{
03: protected ListcString) hairy(int p) ( return nu11; )
04: \}
a. listestring> hairy(int p) \{ refurn null; \}
b. public List> hairy(int p ) (return null; )
c. public ListeCharSequence > hairy(int p) \{return null; \}
d. private ListeString> hairy(int p) (return null;)
e. public Object hairy(int p) \{ return nuli:) public ArrayListestring> hairy(int p) ( return null; \}