A.Change Line 1 to an abstract class:public abstract class API {

B.Change Line 1 to a class:public class API {

C.Change Line 2 to an abstract method:public abstract void checkValue(Object value)throws IllegalArgumentException;

D.Change Line 2 access modifier to protected:protected void checkValue(Object value)throws IllegalArgumentException;

E.Change Line 1 to extend java.lang.AutoCloseable:public interface API extends AutoCloseable {