A.Validate input before storing confidential information.

B.Encapsulate confidential information.

C.Limit access to objects holding confidential information.

D.Manage confidential and other information uniformly.

E.Transparently handle information to improve diagnostics.

F.Clearly identify and label confidential information.

G.Treat user input as normal information.

A.Replace the lock constructor call with new ReentrantLock (true).

B.No change is required.

C.Move the declaration of lock inside the foo method.

D.Make the declaration of lock static.

A.Add extends GeneralException on line 1.
Add extends Exception on line 2.

B.Add extends SpecificException on line 1.
Add extends GeneralException on line 2.

C.Add extends Exception on line 1.
Add extends Exception on line 2.

D.Add extends Exception on line 1.
Add extends GeneralException on line 2.

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

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

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

A.abstract void walk();

B.protected void walk(){}

C.private void walk(){}

D.public abstract void walk();

E.void walk(){}